sneezeyoudaoicibaDictYouDict[sneeze 词源字典]
sneeze: [15] The Old English word for ‘sneeze’ was fnēsan, a distant relative of Greek pneuma ‘breath’ (source of English pneumatic). This survived into Middle English as fnese. The letters f and s were very similar in medieval script, so it could have played a part in the late 15th-century emergence of sneeze. Fnese had largely died out by the early 15th century, and it could well be that when printing got into full swing in the 1490s, with many old manuscript texts being reissued in printed form, printers unfamiliar with the old word fnese assumed it had the much more common initial consonant cluster sn-.

Another factor in the equation is the now obsolete verb neeze ‘sneeze’. This was borrowed in the 14th century from Old Norse hnósja, a descendant of the Indo-European base *ksneu-, which also produced German niesen, Dutch niezen, Swedish nysa, Danish nyse, and Russian chikhat’ ‘sneeze’. It bridged the gap between fnese and sneeze, and the new sneeze no doubt struck people as a more expressive alternative to the old neeze. (Both fnese and neeze go back ultimately to an imitation of the sound of breathing, blowing, or sneezing.)

=> pneumatic[sneeze etymology, sneeze origin, 英语词源]
atchooyoudaoicibaDictYouDict
imitative of the sound of sneezing, first attested 1873, as atcha (a-tschoo is from 1878).
hay fever (n.)youdaoicibaDictYouDict
also hay-fever, 1825, from hay + fever. Also called summer catarrh (1828); not much noted before the 1820s, when it was sometimes derided as a "fashion" in disease.
People are apt to sneeze, in hot weather for example; and people do not die of sneezing now-a-days, as they did in days that no one knows any thing about. We cannot give six draughts a-day, at one and nine pence each, for sneezing: call it the hay-fever. What a wonderful man! what a clever man! he understands the hay-fever: call him in! Thus is the hay-fever among the last in the list of fashionables. ["On Fashions in Physic," London Magazine, October 1825]
pneuma (n.)youdaoicibaDictYouDict
used in English in various sense, from Greek pneuma "a blowing, a wind, blast; breeze; influence; breathed air, breath; odor, scent; spirit of a person; inspiration, a spirit, ghost," from pnein "to blow, to breathe," from PIE root *pneu- "to breathe," of imitative origin (compare Greek pnoe "breath," pnoia "breathing;" Old English fnora "sneezing," fnæran "to snort").
ptarmic (n.)youdaoicibaDictYouDict
"substance which causes sneezing," 1680s, from noun use of Latin ptarmicus, from Greek ptarmikos "causing sneezing," from ptarmos "sneeze."
sneeze (v.)youdaoicibaDictYouDict
late 15c., from Old English fneosan "to snort, sneeze," from Proto-Germanic *fneusanan (compare: Middle Dutch fniesen, Dutch fniezen "to sneeze;" Old Norse fnysa "to snort;" Old Norse hnjosa, Swedish nysa "to sneeze;" Old High German niosan, German niesen "to sneeze"), from Proto-Germanic base *fneu-s- "sneeze," of imitative origin, as is PIE *pneu- "to breathe" (source of Greek pnein "to breathe").

Other imitative words for it, perhaps in various ways related to each other, include Latin sternuere (source of Italian starnutare, French éternuer, Spanish estornudar), Breton strevia, Sanskrit ksu-, Lithuanian čiaudeti, Polish kichać, Russian čichat'.

English forms in sn- might be due to a misreading of the uncommon fn- (represented in only eight words in Clark Hall, mostly in words to do with breathing), or from Norse influence. OED suggests Middle English fnese had been reduced to simple nese by early 15c., and sneeze is a "strengthened form" of this, "assisted by its phonetic appropriateness." Related: Sneezed; sneezing. To sneeze at "to regard as of little value" (usually with negative) is attested from 1806.
sneeze (n.)youdaoicibaDictYouDict
"act of sneezing," 1640s, from sneeze (v.).
sound (adj.)youdaoicibaDictYouDict
"free from special defect or injury," c. 1200, from Old English gesund "sound, safe, having the organs and faculties complete and in perfect action," from Proto-Germanic *sunda-, from Germanic root *swen-to- "healthy, strong" (cognates: Old Saxon gisund, Old Frisian sund, Dutch gezond, Old High German gisunt, German gesund "healthy," as in the post-sneezing interjection gesundheit; also Old English swið "strong," Gothic swinþs "strong," German geschwind "fast, quick"), with connections in Indo-Iranian and Balto-Slavic. Meaning "right, correct, free from error" is from mid-15c. Meaning "financially solid or safe" is attested from c. 1600; of sleep, "undisturbed," from 1540s. Sense of "holding accepted opinions" is from 1520s.
sternutationyoudaoicibaDictYouDict
"The action of sneezing", Late Middle English: from Latin sternutatio(n-), from the verb sternutare, frequentative of sternuere 'to sneeze'.