Synonyms:
inquisitory, probing, searching
Meaning: diligent and thorough in inquiry or investigation; "a probing inquiry"; "a searching investigation of their past dealings"
Usage examples
I seemed to be probing the very deeps of being, but indeed imperceptibly I fell asleep, and sat dreaming.
It might well have been that there was no connection, that it was purely imaginary, like his old idea of the law of the successive distances of the planets, and like so many others of the guesses and fancies which he entertained and spent his energies in probing.