Middle English word yerken comes from Proto-Indo-European *gherbh-, and later Proto-Germanic *garwakōną (To prepare, supply.)

Detailed word origin of yerken

Dictionary entry	Language	Definition
*gherbh-	Proto-Indo-European (ine-pro)
*garwakōną	Proto-Germanic (gem-pro)	To prepare, supply.
ġearcian	Old English (ang)
gearcian	Old English (ang)	To prepare, supply, make ready.
yerken	Middle English (enm)

Words with the same origin as yerken