Frequentatives may be combined with momentanes, that is, to indicate the repetition of a short, sudden action. The momentane "-ahta-" can be prefixed with the frequentative "-ele-" to produce the morpheme "-ahtele-", as in "täristä" "to shake (continuously)" → "tärähtää" "to shake suddenly once" → "tärähdellä" "to shake, such that a single, sudden shaking is repeated". For example, the contrast between these is that ground shakes ("maa tärisee") continuously when a large truck goes by, the ground shakes once ("maa tärähtää") when a cannon fires, and the ground shakes suddenly but repeatedly ("maa tärähtelee") when a battery of cannons is firing.