questˈionable adjective

1. That may be questioned
2. Doubtful, uncertain
3. Open to suspicion
4. Possibly dishonest, improper, immoral, etc
5. Such as questions may be put to, not unwilling to be conversed with (Shakespeare)

questˈionableness noun

questˈionably adverb

questˈionary adjective

1. Asking questions (rare)
2. In the form of questions

1. An asker of questions (obsolete)
2. A questionnaire
3. A quaestionary (Walter Scott)

questioneeˈ noun

Someone who is questioned

questˈioner noun

questˈioning noun and adjective

questˈioningly adverb

questˈionist noun

1. A questioner, a doubter
2. An undergraduate in the final term before proceeding to a degree (Cambridge University and Harvard; obsolete)

questˈionless adjective

1. Unquestioning
2. Beyond question or doubt

Certainly

quesˈtion-begging noun and adjective

Begging the question (see beg the question under beg¹)

question mark noun

1. A point or mark of interrogation (?)
2. A query or unresolved doubt

question master noun

Someone who presides over a quiz, discussion programme or meeting, and puts the questions to the participants

question tag noun

A tag question (qv)

question time noun

(in parliament) a period during each day when members can put questions to ministers

at question

Questionable, open to question

in question

1. Under consideration
2. In dispute, open to question

make question

To demur

no question

1. No possibility
2. Undoubtedly

out of question

Without any doubt

out of the question

Not to be thought of

question of fact (Eng law)

That part of the issue which is decided by the jury

question of law

That part decided by the judge