freshen vs modify

freshen and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
freshen	No	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of freshen; that is, modify is a word with a broader meaning than freshen:

Other hypernyms of freshen include alter, change.

freshen (verb)	modify (verb)
make fresh again	make less severe or harsh or extreme
become or make oneself fresh again	add a modifier to a constituent
make (to feel) fresh	cause to change; make different; cause a transformation