köken: From Esel (“donkey”) + -s- + Brücke (“bridge”), a calque of Latin pōns asinōrum. Apparently attested in German from the 18th c. Compare the same in Dutch ezelsbrug.
mnemonic: anything (especially something in verbal form) used to help remember something
çekim: çoğul jembatan-jembatan keledai
köken: Compound of jembatan (“bridge”) + keledai (“donkey”), calque of Dutch ezelsbruggetje, diminutive of ezelsbrug (“mnemonic”, literally “donkey + bridge”), it in turn a calque of Latin pōns asinōrum.