I. noun
Synonyms: inquiry 2, interrogation, interrogatory, query, question
II. adjective
1.
Synonyms: incredulous , aporetic, disbelieving, quizzical, show-me, skeptical, unbelieving
Antonyms: questionless, unquestioning
2.
Synonyms: inquisitive 1, curious, disquisitive, inquiring, investigative