HackerVoca

: investigation, scrutiny noun [uncountable]
careful and thorough examination of someone or something : careful/close scrutiny: Close scrutiny of the document showed it to be a forgery. | under scrutiny: Diana resented her private life being under such public scrutiny., research
inquisitive : inquiring, curious
insane : lunatic, crazy
insecure : unsafe, uncertain
insolent adjective
rude and not showing any respect: an insolent tone of voice | You insolent child!
insolently adverb
insolence noun [uncountable]
: rude, overbearing, contemptuous, arrogant
instantly : immediately, instantaneously
instrument : tool, implement
insult : scorn, slander1 noun

1 [countable] a false spoken statement about someone that is intended to damage the good opinion that people have

2 [uncountable] the legal offence of making a statement of this kind: The doctor was awarded record damages against her partners for slander.

libel1
slanderer noun [countable] , abuse