c. 1400, funell, fonel, from Old French *founel, apparently a word from a southern French dialect, such as Provençal enfounilh (Weekley calls it "a word from the Southern wine trade"), from Late Latin fundibulum, shortened from Latin infundibulum "a funnel or hopper in a mill," from infundere "pour in," from in- "in" + fundere "to pour" (from nasalized form of PIE root *gheu- "to pour").
It forms all or part of: alchemy; chyle; chyme; confound; confuse; diffuse; diffusion; effuse; effusion; effusive; fondant; fondue; font (n.2) "complete set of characters of a particular face and size of type;" found (v.2) "to cast metal;" foundry; funnel; fuse (v.) "to melt, make liquid by heat;" fusible; fusion; futile; futility; geyser; gush; gust (n.) "sudden squall of wind;" gut; infuse; ingot; parenchyma; perfuse; perfusion; profuse; refund; refuse (v.) "reject, disregard, avoid;" refuse (n.) "waste material, trash;" suffuse; suffusion; transfuse; transfusion.
It is the hypothetical source of/evidence for its existence is provided by: Greek khein "to pour," khoane "funnel," khymos "juice;" Latin fundere (past participle fusus) "melt, cast, pour out;" Gothic giutan, Old English geotan "to pour;" Old English guttas (plural) "bowels, entrails;" Old Norse geysa "to gush;" German Gosse "gutter, drain."
"large cask," especially one for wine, ale, or beer, Old English tunne "tun, cask, barrel," a general North Sea Germanic word (compare Old Frisian tunne, Middle Dutch tonne, Old High German tunna, German tonne), also found in Medieval Latin tunna (9c.) and Old French tonne (diminutive tonneau); perhaps from a Celtic source (compare Middle Irish, Gaelic tunna, Old Irish toun "hide, skin"). Tun-dish (late 14c.) was a funnel made to fit into the bung of a tun.
— That? said Stephen. — Is that called a funnel? Is it not a tundish? —
— What is a tundish? —
— That. The ... the funnel. —
— Is that called a tundish in Ireland? — asked the dean. — I never heard the word in my life. —
— It is called a tundish in Lower Drumcondra — said Stephen, laughing — where they speak the best English.—
— A tundish — said the dean reflectively. — That is a most interesting word I must look that word up. Upon my word I must. —
His courtesy of manner rang a little false, and Stephen looked at the English convert with the same eyes as the elder brother in the parable may have turned on the prodigal. [Joyce, "Portrait of the Artist as a Young Man"]
"funnel-like instrument for assisting hearing or magnifying the voice," 1878, coined (perhaps by Thomas Edison, who invented it) from Greek megas "great" (see mega-) + phone "voice" (from PIE root *bha- (2) "to speak, tell, say"). Related: Megaphonic. In Greek, megalophonia meant "grandiloquence," megalophonos "loud-voiced."