 "pimeys" 'darkness' from "pimeä" 'dark' + '-ness' and "siistiytyä" 'to tidy up oneself' from "siisti" 'tidy' + (a kind of middle voice) + (infinitive suffix).Older and in initial syllables have been shifted to and .Opening diphthongs are in standard Finnish only found in root-initial syllables like in words "tietää" 'to know', "takapyörä" 'rear wheel' (from "taka-" 'back, rear' + "pyörä" 'wheel'; the latter part is secondarily stressed) or "luo" 'towards'.