[with dative] on, upon (positioned at the top of) · [with accusative] on, onto, up (moving to the top of) · [with accusative] on (indicating responsibility)
eş: bei, zu, für
köken: From Middle High German ūf, from Old High German ūf, from Proto-Germanic *upp. This form with a lengthened vowel is originally Upper German. Central German forms were Middle High German uf and (western) up. Compare Dutch op, Low German op, Luxembourgish op, English up.