interrogator Definition

interrogate
verb interrogated, interrogating

1. To question closely and thoroughly, or examine by asking questions, sometimes threateningly.

Thesaurus: cross-examine, question, investigate, inquire, grill, pump (slang), give someone the third degree (slang).
2. Said of a radar set, etc: to send out signals to (a radio beacon) to work out a position.

Derivative: interrogation
noun

A close and thorough questioning, often of a threatening kind
Thesaurus: inquisition, questioning, cross-examination, inquiry, grilling, third degree (slang).

Derivative: interrogator

Someone who interrogates.

A transmitter used to send out interrogating signals.

Etymology: 15c: from Latin interrogare, interrogatum, from rogare to ask.