probe

An inquiry into unfamiliar or questionable activities.

“there was a congressional probe into the scandal”

A flexible slender surgical instrument with a blunt end that is used to explore wounds or body cavities.

An exploratory action or expedition.

An investigation conducted using a flexible surgical instrument to explore an injury or a body cavity.

Examine physically with or as if with a probe.

“probe an anthill”

Question or examine thoroughly and closely.