"probing" in the verb sense
1. probe, examine
question or examine thoroughly and closely
2. probe, dig into, poke into
examine physically with or as if with a probe
"probe an anthill"
"probing" in the adjective sense
1. inquisitory, probing, searching
diligent and thorough in inquiry or investigation
"a probing inquiry"
"a searching investigation of their past dealings"
Source: WordNet® (An amazing lexical database of English)
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