In the NDA English paper, idioms and phrases test whether you know the hidden meaning of a group of words — not their literal meaning. ‘Spill the beans’ has nothing to do with beans; it means to reveal a secret. This guide from The Cavalier shows you how to read these traps, guess unfamiliar idioms, and lock in easy marks under time pressure.
What Exactly Is an Idiom?
An idiom is a fixed group of words whose meaning cannot be worked out from the individual words. The phrase carries a special, agreed-upon meaning that the whole language has accepted over time.
Take ‘to kick the bucket’. Word by word it makes no sense, but as an idiom it means to die. Similarly, ‘a piece of cake’ has nothing to do with dessert — it means something very easy.
The golden rule: never translate an idiom literally. The literal picture is almost always a trap option in the NDA exam. The real answer is the figurative, accepted meaning.
A phrase is simply a group of words that work together as a unit but do not form a full sentence. Many phrases are also idiomatic — for example, ‘by and large’ (mostly), ‘at the eleventh hour’ (at the last moment). In NDA questions, the words ‘idioms’ and ‘phrases’ are used together because both demand the same skill: knowing the hidden meaning.
Think of idioms as the ‘inside language’ of fluent speakers. Native users do not stop to decode them — they simply know that ‘burning the midnight oil’ means working late into the night. Your goal is to build that same instant recognition for the idioms the NDA loves to repeat.
Why Idioms Matter in the NDA Exam
The NDA English paper carries 200 marks (100 questions of 2 marks each), and a steady block of these are pure vocabulary — synonyms, antonyms, idioms and one-word substitutions. Idioms appear almost every year, usually as 2 to 5 questions, sometimes more.
- They need no grammar rule — only that you know the phrase.
- If you know the idiom, the question takes under 20 seconds.
- The same favourite idioms repeat across years, so a good list pays off.
Remember the negative marking: NDA deducts 0.83 marks (one-third) for a wrong answer. If you have no clue and cannot eliminate any option, it is often safer to leave the idiom blank than to guess all four.
Because idioms are learnt slowly through reading, students who start early hold a big edge. Reading a few idioms a day for several months beats cramming a long list the night before the exam — the brain remembers phrases far better when they are spaced out.
How the NDA Frames Idiom Questions
There are two common formats. Knowing both means you waste no time being surprised in the hall.
Format 1: Idiom in a sentence
The idiom is printed inside a sentence, usually underlined or in bold, and you must pick the option that means the same. Example: ‘The new recruit was in the same boat as the rest of us.’ You choose in the same difficult situation.
Format 2: Idiom given alone
Just the idiom is printed, followed by four meanings. You pick the correct one. This is faster because there is no sentence to read.
In both formats, at least one option is the literal meaning of the words. That option is a deliberate trap — idioms are never literal.
Occasionally the paper reverses the task: it gives you a meaning and asks which idiom matches it. The skill is identical — you must hold the real meaning of each idiom firmly in mind.
Strategy 1: Guessing an Unseen Idiom
You will not know every idiom, and that is fine. Use these three tricks to make an educated guess.
- Use the imagery. Picture the literal scene, then ask what feeling it suggests. ‘To bury the hatchet’ pictures putting away a weapon → making peace.
- Use the sentence context. The surrounding words hint at whether the meaning is positive or negative. A scolding tone points to a negative idiom.
- Use the tone of the options. Often three options are neutral and one is clearly emotional — the emotional one is frequently the idiom’s real meaning.
Take ‘to add fuel to the fire’. The image of pouring fuel on flames suggests making a bad situation worse. So you reject calm options like to settle a quarrel and pick to make a problem worse.
Students panic and pick the literal option because it ‘feels safe’. With idioms, the safe-looking literal option is almost always wrong. Trust the figurative meaning.
Strategy 2: Smart Elimination
Even when you are unsure, you can often delete two options quickly and improve your odds dramatically.
- Delete the literal meaning. Idioms are figurative, so the word-by-word option usually goes first.
- Delete the opposite. If the idiom sounds positive, remove any clearly negative option, and vice versa.
- Match the strength. A strong idiom like ‘hit the roof’ (to become very angry) needs a strong answer, not a mild one like slightly annoyed.
With negative marking, narrowing four options down to two before you choose roughly doubles your expected score on guesses. Always eliminate before you commit.
For example, consider ‘once in a blue moon’. If the options are (a) very often, (b) never, (c) very rarely, (d) at night, you can drop the literal night-time option (d), drop the absolute ‘never’ (b), and then choose the better of the remaining two — very rarely (c).
High-Frequency NDA Idioms (Part 1)
These idioms appear again and again in NDA and other defence papers. Learn the meaning, not just the words.
- A blessing in disguise — a good thing that first seemed bad.
- To call it a day — to stop working for the day.
- To beat about the bush — to avoid the main point; to not speak directly.
- To let the cat out of the bag — to reveal a secret by mistake.
- To turn a deaf ear — to ignore; to refuse to listen.
- To make a mountain out of a molehill — to exaggerate a small problem.
- To cost an arm and a leg — to be very expensive.
- To bite the bullet — to face a hard situation bravely.
Group idioms by theme to memorise faster. For example, ‘to spill the beans’, ‘to let the cat out of the bag’ and ‘to give the game away’ all mean to reveal a secret.
High-Frequency NDA Idioms (Part 2)
Keep building the bank. Read each one aloud and try to use it in a sentence of your own — that fixes it in memory.
- To burn the midnight oil — to study or work late into the night.
- To be in hot water — to be in trouble.
- To break the ice — to start a conversation in an awkward setting.
- A bolt from the blue — a sudden, unexpected event.
- To play second fiddle — to take a less important role.
- To smell a rat — to sense that something is wrong.
- To pull someone’s leg — to tease or joke with someone.
- To keep one’s fingers crossed — to hope for good luck.
- To put one’s foot down — to be firm; to refuse strongly.
Maintain a small ‘idiom diary’. Whenever you meet a new idiom in a newspaper or book, note it with one short meaning. By exam time you will have a personal, high-yield list.
Idioms About the Body and Animals
Two themes the NDA loves are body-part idioms and animal idioms. Learning them in clusters makes recall easier.
Body-part idioms
- To keep an eye on — to watch carefully.
- To get cold feet — to lose courage at the last moment.
- To cost an arm and a leg — to be very costly.
- To have a heart of gold — to be very kind.
Animal idioms
- To let sleeping dogs lie — to avoid restarting an old problem.
- A wild goose chase — a pointless, hopeless search.
- To take the bull by the horns — to face a difficulty boldly.
- To be like a fish out of water — to feel uncomfortable in a new setting.
Do not confuse similar-looking idioms. ‘To take the bull by the horns’ (act boldly) is different from ‘a bull in a china shop’ (a clumsy person who causes damage).
A Worked Example
Let us solve a typical NDA idiom question step by step so you can see the thinking in action.
Choose the option that best expresses the meaning of the underlined idiom: ‘After hours of arguing, the two leaders finally decided to bury the hatchet.’
(a) to hide a weapon (b) to make peace (c) to start a fight (d) to dig the ground
Notice that we never needed to have memorised the idiom. Imagery plus context plus elimination led straight to the right answer — the exact method you should rehearse on practice papers.
Previous-Year Style Practice
Here is a question modelled on the NDA pattern. Try it before reading the answer.
Q. Select the option that best expresses the meaning of the idiom: ‘To turn over a new leaf’.
(a) to read a new book (b) to change for the better (c) to waste time (d) to fall sick
Answer: (b) to change for the better. The idiom means to start afresh and improve one’s behaviour or habits. Option (a) is the literal trap (an actual leaf of a book), while (c) and (d) carry the wrong, negative tone.
When the idiom contains a hopeful word like ‘new’, the meaning is usually positive. Let such clues steer you towards the right emotional tone of the answer.
A Simple Preparation Plan
You do not need a thick book of idioms. A steady, light routine works far better for the NDA.
- Learn 5 idioms a day. Write each with one short meaning and one sentence of your own.
- Revise weekly. Every Sunday, test yourself on the week’s 35 idioms by covering the meanings.
- Read English daily. A newspaper editorial or a story exposes you to idioms in real use, which fixes them naturally.
- Solve PYQs. Attempt at least one set of previous-year idiom questions every week to learn the exam’s favourite phrases.
Quality beats quantity. Truly knowing 300 high-frequency idioms cold is worth far more than half-knowing 1,000.
Over a few months this gentle plan builds a strong idiom bank without stress, leaving you calm and quick on exam day.
Quick Recap and Revision
Let us lock in the essentials so this whole guide fits in your head in one minute.
- An idiom has a hidden meaning that is not literal.
- The literal option is almost always a trap — reject it first.
- Guess unseen idioms using imagery, context and tone.
- Eliminate the literal and the opposite, then choose.
- Mind the negative marking (−0.83) — leave blanks when truly clueless.
- Learn 5 idioms a day, revise weekly, and read English daily.
Idioms are some of the most scoring questions in the NDA English paper because they reward steady reading rather than last-minute cramming. Build the habit early, trust the figurative meaning, and these marks become yours every single year. The Cavalier wishes you a confident, high-scoring attempt.
Frequently asked questions
How many idiom questions come in the NDA English paper?
It varies by year, but idioms and phrases usually account for about 2 to 5 questions, each worth 2 marks. Combined with synonyms, antonyms and one-word substitutions, vocabulary forms a large, scoring chunk of the 200-mark paper.
What is the difference between an idiom and a phrase?
A phrase is any group of words that act as a unit but do not form a full sentence. An idiom is a special phrase whose meaning cannot be guessed from the individual words. Many phrases are idiomatic, which is why the NDA groups them together.
How do I answer an idiom I have never seen before?
Picture the literal image and ask what feeling it suggests, use the surrounding sentence for positive or negative tone, then eliminate the literal option and any opposite. This usually leaves one strong choice even for an unfamiliar idiom.
Should I guess idiom questions because of negative marking?
Only guess if you can first eliminate at least one or two options. NDA deducts one-third (0.83) marks for a wrong answer, so a blind four-option guess is risky, but a narrowed two-option guess is usually worth taking.
What is the best way to memorise idioms for the NDA?
Learn about five idioms a day, write a short meaning and your own sentence for each, revise weekly, and read English newspapers to see idioms in real use. Spaced, regular practice fixes idioms far better than last-minute cramming.
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