harass vs get at

harass and get at both are verbs.

Word	Noun	Adjective	Verb	Adverb
harass	No	No	Yes	No
get at	No	No	Yes	No

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

Other hypernyms of harass include annoy, bother, chafe, devil, get to, gravel, irritate, nark, nettle, rag, rile, vex.

harass (verb)	get at (verb)
exhaust by attacking repeatedly	cause annoyance in; disturb, especially by minor irritations
annoy continually or chronically	reach or gain access to
	influence by corruption