humble vs modify

humble is an adjective but modify is not an adjective.

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

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

Other hypernyms of humble include alter, change.

humble (adjective)	modify (adjective)
marked by meekness or modesty; not arrogant or prideful
low or inferior in station or quality
of low birth or station (`base' is archaic in this sense)
used of unskilled work (especially domestic work)

humble (verb)	modify (verb)
cause to feel shame; hurt the pride of	make less severe or harsh or extreme
cause to be unpretentious	add a modifier to a constituent
	cause to change; make different; cause a transformation