köken: From the past participle of the verb apune (“to fade, set”), from Latin apponere. Was the traditional word for "west", but today vest is used as the standard term. Compare also the descendants of Latin ponens in the Western Romance languages, which developed the meaning of "west".
köken: Back-formation from alkonyodik. Created during the Hungarian language reform, which took place in the 18th–19th centuries. First attested in 1746.
köken: Uncertain; possibly from *crepus, *crepes, or *crepos combined with the suffix -culus. One possibility holds that this originates in a Proto-Indo-European form *ksep, that became *ksep-os or *ksep-əs-, then *ksep-os before emerging as *crepus. This sound could be explained through the dissimilation of the initial *s or through a shift from *ks- to *kr-. Varro suggests the term derives from…