köken: From Middle High German laster, from Old High German lastar, from Proto-Germanic *lahstrą (with regular loss of h before st), a variant form of *lahtrą (whence Old English leahtor and Dutch lachter), from the root of *lahaną (“to blame, fault, reproach”) (whence also Old Norse lǫstr and its descendant Icelandic löstur), from Proto-Indo-European *lok-, whence also Old Irish locht.