probing
1. [ noun ] an inquiry into unfamiliar or questionable activities
Synonyms: investigation probe
Examples:

"there was a congressional probe into the scandal"

Related terms: inquiry investigate
2. [ adjective ] diligent and thorough in inquiry or investigation
Synonyms: searching inquisitory
Examples:

"a probing inquiry" "a searching investigation of their past dealings"

Related terms: inquiring
Similar spelling:   proving
  privine
  prebend
  province