questionable
[adjective]
Synonyms: dubious, controversial, debatable, dodgy (Brit., Austral., & N.Z. informal), doubtful, iffy (informal), moot, suspect, suspicious

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Antonyms: unquestionable, authoritative, unquestioned
Contrasted words: dependable, true, trustworthy, trusty, genuine, indubitable, real, undoubted, undubitable, veritable, very
Related Words: refutable, equivocal, obscure, vague

[TahlilGaran] English Synonym Dictionary ▲

ques‧tion‧a‧ble /ˈkwestʃənəbəl/ adjective
[Word Family: noun: question, questioning, questioner, questionnaire; adjective: questionable ≠ unquestionable, questioning ≠ unquestioning, unquestioned; adverb: unquestionably, questioningly ≠ unquestioningly; verb: question]

1. not likely to be true or correct:
The statistics are highly questionable.
it is questionable whether
It is questionable whether the taxpayer receives value for money.

2. not likely to be good, honest, or useful:
I suspected that his motives for helping us were questionable.
He was a man of questionable character.

[TahlilGaran] Dictionary of Contemporary English ▲

questionable
adj.
VERBS be | become | remain
ADV. highly, very Their motives for undertaking this study are highly questionable.
rather, somewhat

[TahlilGaran] Collocations Dictionary ▲