questioner

noun

1. an asking; inquiry
2. something that is asked; interrogative sentence, as in seeking to learn or in testing another's knowledge; query
3. doubt; uncertainty: no question of his veracity
4. something in controversy before a court
5. a problem; matter open to discussion or inquiry
6. a matter or case of difficulty: not a question of money
7. 1. a point being debated or a resolution brought up for approval or rejection before an assembly
   2. the procedure of putting such a matter to a vote

transitive verb

1. to ask a question or questions of; interrogate; put queries to
2. to express uncertainty about; doubt
3. to dispute; challenge

intransitive verb