1. IMPAIR (VERB): (ख़राब) weaken or damage (something, especially a faculty or function).

Synonyms: diminish, spoil

Antonyms: enhance

Example Sentence:

A noisy job could permanently impair their hearing.

2. RELENTLESS (ADJ.): (सतत) unceasingly intense.

Synonyms: continuing, uninterrupted

Antonyms: irresolute

Example Sentence:

She had relentless determination to finish the project.

3. GARNER (VERB): (संचित करना) gather or collect (something, especially information or approval).

Synonyms: accumulate, amass

Antonyms: disperse

Example Sentence:

The police struggled to garner sufficient evidence.

4. LYNCHPIN (NOUN): a person or thing vital to an enterprise or organization.

Synonyms: backbone, keystone

Antonyms: exteriority

Example Sentence:

Nurses are the linchpin of the National Health Service.

5. ENORMITY (NOUN): (दुष्टता) the great or extreme scale, seriousness, or extent of something perceived as bad or morally wrong.

Synonyms: immensity, behemoth

Antonyms: goodness

Example Sentence:

I don't think you realize the enormity of the problem.

6. THRASH OUT (PHRASAL VERB): to talk about (something) in order to make a decision, find a solution, etc.

Synonyms: settle

Antonyms: surrender

Example Sentence:

They had a meeting to thrash out their problems.

7. SURGE (VERB): a sudden and great increase.

Synonyms: rise, pour

Antonyms: recede

Example Sentence:

An unexpected surge in electrical power caused the computer to crash.

8. COGNISANCE (NOUN): (ज्ञान) knowledge or awareness.

Synonyms: perception, notice

Antonyms: ignorance

Example Sentence:

My son has no cognizance that his reckless actions are dangerous.

9. ENTRANT (NOUN): a person or group that enters or takes part in something.

Synonyms: beginner, newcomer

Antonyms: veteran

Example Sentence:

The prize will be awarded to the entrant who wins the tiebreak.

10. PLETHORA (NOUN): (बहुतायत) a large or excessive amount of something.

Synonyms: abundance, surfeit

Antonyms: dearth

Example Sentence:

There are a plethora of books about the royal family.

11. HINGE (VERB): depend entirely on.

Synonyms: depend, pivot

Antonyms: disconnect

Example Sentence:

The future of the industry could hinge on the outcome of next month's election.

12. IMMUTABLE (ADJ): (अडिग) unchanging over time or unable to be changed.

Synonyms: unyielding, fixed

Antonyms: variable

Example Sentence:

Some people regard grammar as an immutable set of rules.