certain

Synonyms: assertive assured believing calm cocksure convinced positive questionless sanguine satisfied secure selfconfident sure unconcerned undisturbed undoubtful undoubting unperturbed untroubled

Antonyms: doubtful doubting hesitant uncertain unconfident unsure

Synonyms: absolute ascertained authoritative clear conclusive confirmable definite demonstrable destined determined establishable evident firm fixed genuine guaranteed having down pat incontrovertible indubitable infallible in the bag irrefutable known on ice plain positive predestined provable real reliable safe salted away set sound supreme sure sure thing true trustworthy unambiguous undeniable undoubted unequivocal unerring unmistakable verifiable

Antonyms: doubtful dubious faltering questionable uncertain unreliable unsure

Synonyms: assured bound certified concluded decided definite determined ensured established guaranteed insured set settled stated stipulated sure warranted

Antonyms: uncertain undecided unfixed unpredictable

Synonyms: a couple a few defined divers express individual many marked numerous one particular precise regular several singular some special specific specified sundry upwards of various