From Germanic roots meaning "play". In the biology sense, it comes specifically from Swedish lek (“child's play”), by means of Swedish leka (“to play”). The verb is first attested in English in 1871 and the noun at least as early as 1867.
Bilêvkirina xwe baştir bike
Vê peyvê binivîse
Axaftin û jiberkirina " lek " û gelek peyv û hevokên din di îngilîzî .