as in conk out, 1918, coined by World War I airmen, perhaps in imitation of the sound of a stalling motor, reinforced by conk (v.) "hit on the head," originally "punch in the nose" (1821), from conk (n.), slang for "nose" (1812), perhaps from fancied resemblance of the nose to a conch (pronounced "conk") shell. Perhaps also imitative: Compare Greek konk, a syllable representing the sound made by a pebble striking the bottom of the (metal) voting urn [William Smith, "Dictionary of Greek and Roman Antiquities"].
"turned up (of the nose), pug," 1802, from French (nez) retroussé (16c.), past-participle adjective from retrousser "to turn up."
"point of land running into the sea," obsolete except in place names (Holderness, Dungeness, etc.) and surnames, Old English næs (West Saxon, Northumbrian), nes (Mercian, Kentish), "a promontory," related to nasu "nose" (from PIE root *nas- "nose"). Cognate with and probably partly from Old Norse nes, Danish næs; also Swedish näs, Middle Dutch nesse.
"acute inflammation of the mucous membranes of the nose, eyes, etc., a head-cold," 1630s, medical Latin, from Latinized form of Greek koryza "running at the nose," which is of uncertain etymology. It is traditionally compared to Germanic words for "mucus," such as Old English hrot, Old High German (h)roz "mucus" which are verbal nouns from Old English hrutan, Old High German hruzzan "to grumble, snore."