1. INTERNECINE (ADJECTIVE): mutually harmful (परस्पर-विध्वंसी)
Synonyms: destructive, deadly
Antonyms: harmless, fortunate
Example Sentence:
The region's history of savage internecine warfare. 
2. MUZZLE (NOUN): prevent a person from expressing his opinions freely. (न बोलने देना)
Synonyms: gag, restrain
Antonyms: allow, encourage
Example Sentence:
The teacher says the accident was a total freak. 
3. FRENETIC (ADJECTIVE): frantic (उन्मादपूर्ण)
Synonyms: frenzied, obsessive
Antonyms: calm, peaceful
Example Sentence:
That was a frenetic pace of activity. 
4. IMPETUS (NOUN): catalyst (प्रेरणा)
Synonyms: impulse, momentum
Antonyms: block, hindrance
Example Sentence:
The ending of the cold war gave new impetus to idealism. 
5. BRAVE (VERB): sustain: (सहन करना)
Synonyms: confront, withstand
Antonyms: dodge, skip
Example Sentence:
These people braved the chemical attacks. 
6. GULLIBLE (ADJECTIVE): foolish (आसानी से धोखा खानेवाला)
Synonyms: unsophisticated, artless
Antonyms: wise, perceptive
Example Sentence:
It was an attempt to persuade a gullible public. 
7. GRATUITOUS (ADJECTIVE): free (निःशुल्क)
Synonyms: charge-less, costless
Antonyms: costly, expensive
Example Sentence:
The homeless shelter provides food gratuitous for needy individuals. 
8. HEARSAY (NOUN): blasphemy (अफ़वाह)
Synonyms: fallacy, apostasy
Antonyms: agreement, belief
Example Sentence:
According to hearsay, he broke his previous record. 
9. GRAVE (ADJECTIVE): sober (गंभीर)
Synonyms: sage, subdued
Antonyms: agitated, boisterous
Example Sentence:
Harsh gave a grave look. 
10. GUST (NOUN): blast (झोंका)
Synonyms: breeze, burst
Antonyms: calm, quiet
Example Sentence:
We all felt a sudden gust of wind.