unarticulate vs dumb

unarticulate and dumb both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unarticulate	No	Yes	No	No
dumb	No	Yes	No	No

unarticulate (adjective)	dumb (adjective)
without or deprived of the use of speech or words	slow to learn or understand; lacking intellectual acuity
	unable to speak because of hereditary deafness
	temporarily incapable of speaking
	lacking the power of human speech