[OE] The prehistoric Germanic ancestor of lid was *khlitham, which also produced Dutch lid and the -lid of German augenlid ‘eyelid’. It comes ultimately from the Indo-European base *kli- ‘cover, shut’.
lid (n.)mid-13c., from Old English hlid "lid, cover, opening, gate," from Proto-Germanic *khlithan (cognates: Old Norse hlið "gate, gap," Swedish lid "gate," Old French hlid, Middle Dutch lit, Dutch lid, Old High German hlit "lid, cover"), from PIE root *klei- "to lean" (see lean (v.)), with here perhaps the sense of "that which bends over." Meaning "eyelid" is from early 13c. Slang sense of "hat, cap" is attested from 1896. Slang phrase put a lid on "clamp down on, silence, end" is from 1906.
