Many verbs have a secondary meaning indicating that the primary meaning was repeated. In your examples you needed to add the adverb "repeatedly" to indicate repetition. The verbs "annoy and attack" do not imply repeated actions. So I looked in a thesaurus for the verb "repeat". The primary meaning is "to do smth again/over and over". I found the following: repeat: verb Definition: duplicate, do again Synonyms: belabour, chime, come again, din, ditto*, drum into, dwell on, echo, go over again, hold over, imitate, ingeminate, iterate, make like, occur again, play back, play over, quote, read back, reappear, recapitulate, recast, reciprocate, recite, reconstruct, recrudesce, recur, redo, refashion, reform, rehash, rehearse, reissue, reiterate, relate, remake, renew, reoccur, replay, reprise, reproduce, rerun, resay, reshow, restate, retell, return, revert, revolve, rework, run over, sing same old song. * = informal/non-formal usage source: http://thesaurus.com/browse/repeat

do something repeatedly = keep doing something He keeps pestering me. He keeps harassing me.