HackerVoca

unwary, thoughtless, careless,imprudent / adjective formal
not sensible or wise: It would be rather imprudent to invest in an arms company
at the moment.
imprudently adverb
imprudence noun [countable, uncountable]

improvised : impromptu adjective
done or said without any preparation or planning: an impromptu party
impromptu adverb : He insists he was speaking impromptu.
impudent : brazen / adjective

1 behaving in an immoral way without being embarrassed or ashamed : a brazen hussy (=a woman who behaves this way, especially sexually)

2 brazen lie/attitude a lie or bad attitude that is shocking because the person responsible is not ashamed of it

3 literary having a shiny yellow colour

brazen sth out phrasal verb [transitive]

to deal with a situation that is difficult or embarrassing for you by appearing to be confident rather than ashamed, insolent adjective
rude and not showing any respect: an insolent tone of voice | You insolent child!
insolently adverb
insolence noun [uncountable] , rude