dig into vs penetrate

dig into and penetrate both are verbs.

Word	Noun	Adjective	Verb	Adverb
dig into	No	No	Yes	No
penetrate	No	No	Yes	No

As verbs, penetrate is a hypernym of dig into; that is, penetrate is a word with a broader meaning than dig into:

Other hypernyms of dig into include perforate.

dig into (verb)	penetrate (verb)
examine physically with or as if with a probe	come to understand
	become clear or enter one's consciousness or emotions
	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