I. noun
1.
Synonyms: inquiry 2, interrogation, interrogatory, query, questioning
2.
Synonyms: problem 2, issue, nut
3.
Synonyms: demur 2, challenge, demurral, demurrer, difficulty, objection, protest, remonstrance, remonstration
II. verb
1.
Synonyms: ask 1, catechize, examine, inquire, interrogate, query, quiz
2.
to express doubt about
questioned his decision to take a new job
Synonyms: challenge, dispute, doubt, mistrust
Related Word: suspect, ||suspicion; hesitate (over), puzzle (over), wonder (about)