PIE *leigh, lick, onomatopoeiaから。語源はlecher, lichenと同じ。
Beres ben brought forthe al fowle and transformyd and after that by lyckyng of the fader and the moder they ben brought in to theyr kyndely shap. ["The Pylgremage of the Sowle," 1413]
Now shal this heape licke up all that is about vs, euen as an oxe licketh vp the grasse in the field.But to lick (of) the whip "taste punishment" is attested from mid-15c.