penetrate vs ingrain

penetrate and ingrain both are verbs.

Word	Noun	Adjective	Verb	Adverb
penetrate	No	No	Yes	No
ingrain	No	No	Yes	No

As verbs, ingrain is a hyponym of penetrate; that is, ingrain is a word with a more specific, narrower meaning than penetrate:

penetrate (verb)	ingrain (verb)
come to understand	produce or try to produce a vivid impression of
become clear or enter one's consciousness or emotions	thoroughly work in
pass into or through, often by overcoming resistance
insert the penis into the vagina or anus of
spread or diffuse through
make one's way deeper into or through
enter a group or organization in order to spy on the members