muddy vs modify

muddy is an adjective but modify is not an adjective.

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

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

Other hypernyms of muddy include alter, change.

muddy (adjective)	modify (adjective)
dirty and messy; covered with mud or muck
(of color) discolored by impurities; not bright and clear
(of liquids) clouded as with sediment
(of soil) soft and watery

muddy (verb)	modify (verb)
make turbid	make less severe or harsh or extreme
cause to become muddy	add a modifier to a constituent
dirty with mud	cause to change; make different; cause a transformation