penetrating

penetrating /ˈpɛnəˌtreɪtɪŋ/ adjective
penetrating
/ˈpɛnəˌtreɪtɪŋ/
adjective
Britannica Dictionary definition of PENETRATING
[more penetrating; most penetrating]
1 
a  : able to understand something clearly and fully
b  : helping people to understand something clearly and fully
2 
: spreading out deeply or widely
3 
of sounds : loud and clear and sometimes unpleasant
4 
◊ People who have penetrating eyes or a penetrating gaze/stare/look make you feel uncomfortable by looking at you in a way that makes you feel that they know what you are thinking.

— penetratingly

adverb