Mock
late Middle English: from Old French mocquer ‘deride’.
wiktionary
From Middle English mokken, from Old French mocquer, moquier(“to deride, jeer”), from Middle Dutch mocken(“to mumble”) or Middle Low German mucken(“to grumble, talk with the mouth half-opened”), both from Proto-West Germanic *mokkijan, *mukkijan(“to low, bellow; mumble”), from Proto-Germanic *mukkijaną, *mūhaną(“to low, bellow, shout”), from Proto-Indo-European *mūg-, *mūk-(“to low, mumble”). Cognate with Dutch mokken(“to sulk; pout; mope; grumble”), Old High German firmucken(“to be stupid”), Modern German mucksen(“to utter a word; mumble; grumble”), West Frisian mokke(“to mope; sulk; grumble”), Swedish mucka(“to murmur”), dialectal Dutch mokkel(“kiss”).
etymonline
mock (v.)
mid-15c., mokken, "make fun of," also "to trick, delude, make a fool of; treat with scorn, treat derisively or contemptuously;" from Old French mocquer "deride, jeer," a word of unknown origin. Perhaps from Vulgar Latin *muccare "to blow the nose" (as a derisive gesture), from Latin mucus; or possibly from Middle Dutch mocken "to mumble" or Middle Low German mucken "grumble." Perhaps ultimately it is imitative of such speech. Related: Mocked; mocking. Replaced Old English bysmerian. The sense of "imitate, simulate, resemble closely" (1590s, as in mockingbird ; also see mock (adj.)) is from the notion of derisive imitation.
mock (adj.)
prefixed to a noun, "feigned, counterfeit, spurious; having a close (but deceptive) resemblance," 1540s, from mock, verb and noun. Mock-heroic "counterfeiting or burlesquing the heroic style or character" is attested from 1711 (Addison), describing a satirical use of a serious form; mock-turtle "calf's head stewed or baked and dressed to resemble a turtle," is from 1758; as a kind of soup by 1783.
mock (n.)
early 15c., mokke, "derisive action or speech;" late 15c. (Caxton) "that which one derides or mocks;" from mock (v.).
