An Etymological Dictionary of the German Language/sickern

by Friedrich Kluge

sickern, vb., ‘to trickle, drop,’ ModHG. only, from LG.?. Comp. AS. sicerian, ‘to trickle, ooze’; allied to seichen and sinken (Teut. root sī̆k, sī̆h, from Aryan sig, sik).