utterly vs utter

utterly is not an adjective while utter is an adjective.

Word	Noun	Adjective	Verb	Adverb
utterly	No	No	No	Yes
utter	No	Yes	Yes	No

utterly (adjective)	utter (adjective)
	complete and absolute
	without qualification; used informally as (often pejorative) intensifiers

utterly (verb)	utter (verb)
	express in speech
	articulate; either verbally or with a cry, shout, or noise
	express audibly; utter sounds (not necessarily words)
	put into circulation

utterly (adverb)	utter (adverb)
completely and without qualification; used informally as intensifiers