worsen vs modify

worsen and modify both are verbs.

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

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

Other hypernyms of worsen include alter, change.

worsen (verb)	modify (verb)
grow worse	make less severe or harsh or extreme
make worse	add a modifier to a constituent
	cause to change; make different; cause a transformation