sex up vs modify

sex up and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
sex up	No	No	Yes	No
modify	No	No	Yes	No

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

Other hypernyms of sex up include alter, change.

sex up (verb)	modify (verb)
give erotic character to or make more interesting	make less severe or harsh or extreme
	add a modifier to a constituent
	cause to change; make different; cause a transformation