frequentative

from WordNet (r) 3.0 (2006)

frequentative
    n 1: a verb form that serves to express frequent repetition of
         an action

from The Collaborative International Dictionary of English v.0.48

Frequentative \Fre*quent"a*tive\, a. [L. frequentativus: cf. F.
   fr['e]quentatif.] (Gram.)
   Serving to express the frequent repetition of an action; as,
   a frequentative verb. -- n. A frequentative verb.
   [1913 Webster]