Online Etymology Dictionary

snout: c.1220, "trunk or projecting nose of an animal," from M.L.G. and M.Du. snute "snout," from P.Gmc. *snut- (cf. Ger. Schnauze, Norw. snut, Dan. snude "snout"), related to O.E. gesnot (see snot).
hedge: O.E. hecg, originally any fence, living or artificial, from W.Gmc. *khagja (cf. M.Du. hegge, O.H.G. hegga, Ger. Hecke "hedge"), from PIE. *khagh- "to encompass, enclose" (cf. L. caulae "a sheepfold, enclosure," Gaul. caio "circumvallation," Welsh cae "fence, hedge"). Related to O.E. haga "enclosure, hedge" (see haw). Prefixed to any word, it "notes something mean, vile, of the lowest class" [Johnson], from contemptuous attributive sense of "plying one's trade under a hedge" (hedge-priest, hedge-lawyer, hedge-wench, etc.), a usage attested from c.1530. The verb sense of "dodge, evade" is first recorded 1598; that of "insure oneself against loss," as in a bet, is from 1672. Hedgehog is c.1450 (replacing O.E. igl), the second element an allusion to its pig-like snout. Hedgerow is O.E. heggeræw.
nipple: 1538, nyppell, alt. of neble, probably dim. of O.E. neb "bill, beak, snout" (see neb), hence, lit. "a small projection."
schnauzer: breed of terrier, 1923, from Ger. Schnauzer, lit. "growler," from schnauzen "to snarl, growl," from Schnauze "snout, muzzle," which is related to M.E. snute, snoute "snout" (see snout).
schnozz: "nose," 1942, from Yiddish shnoitsl, from Ger. Schnauze "snout" (see schnauzer).
groyne: "strong, low sea wall," 1582, from obsolete groin "pig's snout" (because ir was thought to look like one), from O.Fr. groin, from L. grunnire "grunt."
tout: 1700, thieves' cant, "to act as a lookout, spy on," from M.E. tuten "to peep, peer," probably from a variant of O.E. totian "to stick out, peep, peer," from P.Gmc. *tut- "project" (cf. Du. tuit "sprout, snout," M.Du. tute "nipple, pap," M.L.G. tute "horn, funnel," O.N. tota "teat, toe of a shoe"). The sense developed to "look out for jobs, votes, etc., to try to get them" (1731), then "praise highly" (1920).
root (v1.): "dig with the snout," 1538, from M.E. wroten "dig with the snout," from O.E. wrotan, from P.Gmc. *wrotanan (cf. O.N. rota, Swed. rota "to dig out, root," M.L.G. wroten, M.Du. wroeten, O.H.G. ruozian "to plow up"), cognate with L. rodere "to gnaw" (see rodent). Associated with the verb sense of root (n.). Extended sense of "poke about, pry" first recorded 1831. Phrase root hog or die "work or fail" first attested 1834, Amer.Eng. (in works of Davey Crockett, who noted it as an "old saying"). Reduplicated form rootin' tootin' "noisy, rambunctious" is recorded from 1875.
rostrum: 1542, from L. rostrum, name of the platform stand for public speakers in the Forum in ancient Rome. It was decorated with the beaks of ships taken in the first naval victory of the Roman republic, over Antium, in 338 B.C.E., and the word's older sense is "end of a ship's prow," lit. "beak, muzzle, snout," originally "means of gnawing," instrument noun form of rodere "to gnaw" (see rodent). Cf. claustrum "lock, bar," from claudere "to shut." Extended sense of any platform for public speaking is first recorded 1766. Plural form is rostra.
router: "cutter that removes wood from a groove," 1818, from rout "poke about, rummage" (1547), originally of swine digging with the snout; a variant of root (v.1).
snoot: "the nose," 1861, originally a Scottish variant of snout. The adj. snooty is first recorded 1919, probably an alteration of snouty (1858), the notion being of looking down one's nose. Snootful "as much (liquor) as one can take" is attested from 1918.
snorkel: 1944, "airshaft for submarines," from Ger. Schnorchel, from Ger. navy slang Schnorchel "nose, snout," related to schnarchen "to snore" (see snore). So called from its resemblance to a nose and its noise when in use. The Anglicized spelling first recorded 1949. The meaning "curved tube used by a swimmer to breathe under water" is first recorded in 1953.
snot: O.E. gesnot "nasal mucus," from P.Gmc. *snuttan (cf. O.Fris. snotta, M.L.G., M.Du. snotte, M.L.G. snute), from the same base as snout. O.E. also had a verb snite "wipe or pick one's nose." Meaning "despicable person" is from 1809. Snotty "impudent, curt, conceited" first recorded 1870; snotnose "upstart" is from 1941.
socket: c.1300, "spearhead" (originally one shaped like a plowshare), from Anglo-Fr. soket "spearhead" (c.1260), dim. of O.Fr. soc "plowshare," from V.L. *soccus, probably from a Gaulish source, cf. Welsh swch "plowshare," Middle Irish soc "plowshare," prop. "hog's snout," cognate with L. sus "swine;" see sow (n.) "female pig." Meaning "hollow part or piece for receiving and holding something" first recorded 1448; anatomical sense is from 1601; domestic electrical sense first recorded 1885. Socket wrench is attested from 1905.
trunk: 1462, "box, case," from O.Fr. tronc "alms box in a church" (12c.), also "trunk of a tree, trunk of the human body," from L. truncus, originally "mutilated, cut off." The meaning "box, case" is likely to be from the notion of the body as the "case" of the organs. Eng. acquired the other two senses of the O.Fr. word later; sense of "main stem of a tree" dates from 1490; that of "torso of a human body" from 1494. The sense of "luggage compartment of a motor vehicle" is from 1930. The use in reference to an elephant's snout is from 1565, probably from confusion with trump (short for trumpet). Railroad trunk line is attested from 1843; telephone version is from 1889.
moraine: "ridge of rock deposited by a glacier," 1789, from Fr. moraine, from Savoy dialect morena "mound of earth," from Prov. morre "snout, muzzle," from V.L. *murrum "round object," of unknown origin, perhaps from a pre-L. Alpine language.
morgue: "mortuary," 1821, from Fr. Morgue, originally a specific building in Paris where bodies were exposed for identification; originally the place where new prisoners were displayed to keepers to establish their identification. Probably from morgue "haughtiness," originally "a sad expression, solemn look," from O.Fr. morguer "look solemnly," from V.L. *murricare "to make a face, pout," from *murrum "muzzle, snout." Adopted as a general term in U.S., 1880s, replacing earlier dead house, etc. In newspaper slang, "collection of pre-written obituary material of living persons" (1903), hence "library of clips, photos, etc.," 1918.
porpoise: 1309, from O.Fr. porpais (12c.), lit. "pork fish," from porc "pork" (see pork) + peis "fish," from L. piscis "fish." The O.Fr. word is probably a loan-translation of a Gmc. word, cf. M.Du. mereswijn "porpoise" (cf. Mod.Fr. marsouin). Classical L. had a similar name, porculus marinus (in Pliny), and the notion behind the name likely is a fancied resemblance of the snout to that of a pig.
sow (n.): O.E. sugu, su "female of the swine," from P.Gmc. *sugo (cf. O.S., O.H.G. su, Ger. Sau, Du. zeug, O.N. syr), from PIE base *su- (cf. Skt. sukarah "wild boar, swine;" Avestan hu "wild boar;" Gk. hys "swine;" L. sus "swine," swinus "pertaining to swine;" O.C.S. svinija "swine;" Lett. sivens "young pig;" Welsh hucc, Ir. suig "swine; O.Ir. socc "snout, plowshare"), possibly imitative of pig noise, a notion reinforced by the fact that Skt. sukharah means "maker of (the sound) 'su.' " Related to swine. As a term of abuse for a woman, attested from 1508.
mull (n.): "promontory" (in Scottish place names), late 14c., perhaps from O.N. muli "a jutting crag, projecting ridge (between two valleys)," which probably is identical with muli "snout, muzzle." The O.N. word is related to O.Fris. mula, M.Du. mule, muul, O.H.G. mula, Ger. Maul "muzzle, mouth." Alternative etymology traces it to Gael. maol "brow of a hill or rock," also "bald," from O.Celt. *mailo-s (cf. Ir. maol, O.Ir. máel, máil, Welsh moel).
muse (v.): "to be absorbed in thought," mid-14c., from O.Fr. muser (12c.) "to ponder, loiter, waste time," lit. "to stand with one's nose in the air" (or, possibly, "to sniff about" like a dog who has lost the scent), from muse "muzzle," from Gallo-Romance *musa "snout," of unknown origin. Probably influenced in sense by Muse.
muzzle: late 14c., "device put over an animal's mouth to stop it from biting, eating, or rooting," from O.Fr. musel (12c.), from muse "muzzle," from Gallo-Romance *musa "snout," of unknown origin, possibly related to L. morsus "bite." Meaning "projecting part of the head of an animal" is from c.1410; sense of "open end of a firearm" first recorded 1566. The verb meaning "to put a muzzle on" is first recorded c.1470.