Deterrent(noun)
A thing that discourages or is intended to discourage someone from doing something.
Hindi meaning:निवारक
Synonyms: Hindrance, Obstruction, Restraint, Discourage
Antonyms: Encouraging, Stimulus, Lure, Spur
Example: Hopefully his punishment will act as a deterrent to others.
Trick to remember: Dettol germs ke liye deterrent hai. 
