This is the 8577th most frequent Japanese word.
探る
"探る" means "to probe, investigate, or explore."
探る is used to mean 'to probe or search' in a metaphorical sense, referring to seeking out someone's secrets.
彼の秘密を探るのは良くないことだ。
It is not a good thing to probe his secrets.
探る is used in a physical sense of 'explore or search,' referring to investigating the seabed.
海底を探るために特別な装置を使います。
We use special equipment to explore the seabed.
探る is employed to mean 'to investigate or search,' referring to uncovering hidden information.