pick at vs pick apart

pick at and pick apart both are verbs.

Word	Noun	Adjective	Verb	Adverb
pick at	No	No	Yes	No
pick apart	No	No	Yes	No

As verbs, pick apart is a hypernym of pick at; that is, pick apart is a word with a broader meaning than pick at:

pick at: express a negative opinion of
pick apart: find fault with; express criticism of; point out real or perceived flaws

Other hypernyms of pick at include criticise, criticize, knock.

pick at (verb)	pick apart (verb)
express a negative opinion of	find fault with; express criticism of; point out real or perceived flaws
eat like a bird
pluck or pull at with the fingers