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navy [navy 词源字典]: navy: [14] Latin nāvis ‘ship’ is the ultimate source of navy. In post-classical times it spawned an offspring nāvia ‘fleet’, which passed into English via Old French navie. Other Latin derivatives of nāvis were nāvālis, source of English naval [16], and the verb nāvigāre ‘manage a ship’, from which English gets navigate [16] (navvy [19] originated as a colloquial abbreviation for navigator, a term applied to someone who dug ‘navigation canals’).

In medieval Latin nāvis was applied to the central part of a church, from the passing resemblance in shape to a ship, and the word was anglicized as nave [17]. Nāvis was related to Greek naus ‘ship’, whose contributions to English include nautical [16], nautilus [17], nausea [16] (etymologically ‘seasickness’), and, somewhat surprisingly, noise.
=> nausea, nautical, navigate, noise[navy etymology, navy origin, 英语词源]
nausea (n.): early 15c., vomiting, from Latin nausea "seasickness," from Ionic Greek nausia (Attic nautia) "seasickness, nausea, disgust," literally "ship-sickness," from naus "ship" (see naval). Despite its etymology, the word in English seems never to have been restricted to seasickness.
noise (n.): early 13c., "loud outcry, clamor, shouting," from Old French noise "din, disturbance, uproar, brawl" (11c., in modern French only in phrase chercher noise "to pick a quarrel"), also "rumor, report, news," apparently from Latin nausea "disgust, annoyance, discomfort," literally "seasickness" (see nausea).

Another theory traces the Old French word to Latin noxia "hurting, injury, damage." OED considers that "the sense of the word is against both suggestions," but nausea could have developed a sense in Vulgar Latin of "unpleasant situation, noise, quarrel" (compare Old Provençal nauza "noise, quarrel"). Meaning "loud or unpleasant sound" is from c. 1300. Replaced native gedyn (see din).
seasick (adj.): also sea-sick, 1560s, from sea + sick (n.). Related: Seasickness.
vomit (n.): late 14c., "act of expelling contents of the stomach through the mouth," from Anglo-French vomit, Old French vomite, from Latin vomitus, from vomitare "to vomit often," frequentative of vomere "to puke, spew forth, discharge," from PIE root *weme- "to spit, vomit" (cognates: Greek emein "to vomit," emetikos "provoking sickness;" Sanskrit vamati "he vomits;" Avestan vam- "to spit;" Lithuanian vemiù "to vomit," Old Norse væma "seasickness"). In reference to the matter so ejected, it is attested from late 14c.