arse about vs stagnate

arse about and stagnate both are verbs.

Word	Noun	Adjective	Verb	Adverb
arse about	No	No	Yes	No
stagnate	No	No	Yes	No

As verbs, stagnate is a hypernym of arse about; that is, stagnate is a word with a broader meaning than arse about:

Other hypernyms of arse about include idle, laze, slug.

arse about (verb)	stagnate (verb)
be lazy or idle	be idle; exist in a changeless situation
	cease to flow; stand without moving
	stand still
	cause to stagnate