"penetrating" in the verb sense
1. penetrate, perforate
pass into or through, often by overcoming resistance
"The bullet penetrated her chest"
2. penetrate, fathom, bottom
come to understand
3. click, get through, dawn, come home, get across, sink in, penetrate, fall into place
become clear or enter one's consciousness or emotions
"It dawned on him that she had betrayed him"
"she was penetrated with sorrow"
4. infiltrate, penetrate
enter a group or organization in order to spy on the members
"The student organization was infiltrated by a traitor"
make one's way deeper into or through
"The hikers did not manage to penetrate the dense forest"
insert the penis into the vagina or anus of
"Did the molester penetrate the child?"
7. permeate, pervade, penetrate, interpenetrate, diffuse, imbue, riddle
spread or diffuse through
"An atmosphere of distrust has permeated this administration"
"music penetrated the entire building"
"His campaign was riddled with accusations and personal attacks"
"penetrating" in the adjective sense
1. acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp
having or demonstrating ability to recognize or draw fine distinctions
"an acute observer of politics and politicians"
"icy knifelike reasoning"
"as sharp and incisive as the stroke of a fang"
"frequent penetrative observations"
2. penetrative, penetrating
tending to penetrate having the power of entering or piercing
"a toxic penetrative spray applied to the surface"
"a cold penetrating wind"
"a penetrating odor"
Source: WordNet® (An amazing lexical database of English)
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