articulate vs ask

articulate is an adjective but ask is not an adjective.

Word	Noun	Adjective	Verb	Adverb
articulate	No	Yes	Yes	No
ask	No	No	Yes	No

As verbs, ask is a hyponym of articulate; that is, ask is a word with a more specific, narrower meaning than articulate:

Other hyponyms of articulate include lexicalise, lexicalize, dogmatise, dogmatize, formularise, formularize, cast, couch, frame, put, redact.

articulate (adjective)	ask (adjective)
expressing yourself easily or characterized by clear expressive language
consisting of segments held together by joints

articulate (verb)	ask (verb)
speak, pronounce, or utter in a certain way	make a request or demand for something to somebody
express or state clearly	direct or put; seek an answer to
put into words or an expression	address a question to and expect an answer from
provide with a joint	consider obligatory; request and expect
unite by forming a joint or joints	require or ask for as a price or condition
	make a date
	require as useful, just, or proper