adverse vs unfavourable

adverse and unfavourable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
adverse	No	Yes	No	No
unfavourable	No	Yes	No	No

adverse (adjective)	unfavourable (adjective)
in an opposing direction	(of winds or weather) tending to hinder or oppose
contrary to your interests or welfare	not encouraging or approving or pleasing
	involving or creating circumstances detrimental to success or effectiveness