*flakuraz

A deverbal adjective in Proto-Indo-European *-rós (forms adjectives from Caland system roots), *flak-u-raz, built from the stem of *flakkōþi ~ *flakunanþi, from *flakkōną (‘to beat’), iterative of *flōkaną (‘to beat, strike; lament’), ultimately from Proto-Indo-European extended root *pleh₂g-, from root *pel- (‘to beat, push, drive’). Grestenberger et al. (in press) argue that Proto-Germanic iterative r-verbs arose through the reanalysis of adjectival *(V)r-morphology as an event-modifying verbal suffix and consider the verbal adjective (such as this) as the source of these iterative r-verbs (in this case, *flakurōną (‘to beat repeatedly, flutter’).