An Etymological Dictionary of the German Language/Unflat

by Friedrich Kluge

Unflat, m., ‘filth, dirt,’ from MidHG. un-vlât, m., n., and f., ‘dirtiness, untidiness’; to which is allied unflätig, adj. ‘filthy, nasty,’ from MidHG. unvlœtic, ‘unclean, untidy.’ OHG. *flât, ‘beauty,’ is met with only in female proper names (Sigi-, Muot-, Hruoī̆-flât). The early history of OHG. *flât (Goth. flêd, AS. flœ̂d in proper names) is obscure.