Socket
Middle English (in the sense ‘head of a spear, resembling a ploughshare’): from an Anglo-Norman French diminutive of Old French soc ‘ploughshare’, probably of Celtic origin.
wiktionary
From Middle English socket, soket, from Anglo-Norman soket(“spearhead”), diminutive of Old French soc(“plowshare”), from Vulgar Latin *soccus, a word borrowed from Gaulish, from Proto-Celtic *sukkos (compare modern Welsh swch(“plowshare”)), literally "pig's snout," from Proto-Indo-European *suH-.
etymonline
socket (n.)
c. 1300, "spearhead" (originally one shaped like a plowshare), from Anglo-French soket "spearhead, plowshare" (mid-13c.), diminutive of Old French soc "plowshare," from Vulgar Latin *soccus, perhaps from a Gaulish source, from Celtic *sukko- (source also of Welsh swch "plowshare," Middle Irish soc "plowshare"), properly "hog's snout," from PIE *su- "pig" (source also of Latin sus "swine;" see sow (n.) "female pig").
Meaning "hollow part or piece for receiving and holding something" first recorded early 15c.; anatomical sense is from c. 1600; domestic electrical sense first recorded 1885. Socket wrench is attested from 1837. The verb is 1530s, from the noun. Related: Socketed; socketing.
