questioning
[noun]
Synonyms: inquiry, interrogation, interrogatory, query, question
[adjective]
Synonyms: incredulous, aporetic, disbelieving, quizzical, show-me, skeptical, unbelieving, inquisitive, curious, disquisitive, inquiring, investigative

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Antonyms: questionless, unquestioning

[TahlilGaran] English Synonym Dictionary ▲

ques‧tion‧ing /ˈkwestʃənɪŋ/ adjective
[Word Family: noun: question, questioning, questioner, questionnaire; adjective: questionable ≠ unquestionable, questioning ≠ unquestioning, unquestioned; adverb: unquestionably, questioningly ≠ unquestioningly; verb: question]
a questioning look or expression shows that you have doubts about something or need some information:
Mrs Carson gave Ruth a questioning look.
—questioningly adverb

[TahlilGaran] Dictionary of Contemporary English ▲