An Etymological Dictionary of the German Language, F (1891)
by Friedrich Kluge, translated by John Francis Davis
fach
Friedrich Kluge2521069An Etymological Dictionary of the German Language, F — fach1891John Francis Davis

fach, adj., suffix, ‘-fold,’ from MidHG. (very rare) vach, in manecvach, zwivach, OHG. not found; mannigfach, lit. ‘with many divisions’; moreover, MidHG. vach, denotes also ‘fold,’ and -fach as a suffix may be an imitation of the earlier suffix -falt in manecvalt, ‘manifold.’