delete vs expunge

delete and expunge both are verbs.

Word	Noun	Adjective	Verb	Adverb
delete	No	No	Yes	No
expunge	No	No	Yes	No

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

Other hyponyms of delete include efface, erase, rub out, score out, wipe off, excise, scratch, strike.

delete (verb)	expunge (verb)
cut or eliminate	remove by erasing or crossing out or as if by drawing a line
wipe out digitally or magnetically recorded information
remove or make invisible