adjective
1.
Synonyms: moot , arguable, debatable, disputable, doubtful, mootable, problematic, questionable, uncertain
2.
Synonyms: doubtful 1, dubitable, equivocal, fishy, open, problematic, suspect, uncertain, unclear, undecided
Related Word: skeptical; mistrustful; disinclined, hesitant, reluctant
Contrasted words: dependable, tried, trustworthy, trusty; certain, positive, sure
Antonyms: cocksure; reliable
3.
Synonyms: improbable 1, doubtful, questionable, unlikely
4.
Synonyms: unreliable 1, fly-by-night, questionable, trustless, undependable, unsure, untrustworthy, untrusty
Antonyms: trustworthy