dumb vs unarticulate

dumb and unarticulate both are adjectives.

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

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