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pack (v.)[pack 词源字典]: c. 1300, "to put together in a pack," from pack (n.), possibly influenced by Anglo-French empaker (late 13c.) and Medieval Latin paccare "pack."

Some senses suggesting "make secret arrangement" are from an Elizabethan mispronunciation of pact. Sense of "to carry or convey in a pack" (1805) led to general sense of "to carry in any manner;" hence to pack heat "carry a gun," underworld slang from 1940s; "to be capable of delivering" (a punch, etc.), from 1921. Related: Packed; packing.[pack etymology, pack origin, 英语词源]
pack-horse (n.): late 15c., from pack (n.) + horse (n.).
pack-rat (n.): common name for the North American bushytailed woodrat (Neotoma cinerea) 1885, from pack (v.); so called from the rodents' habit of dragging objects off to their holes. Used figuratively or allusively from c. 1850 of persons who won't discard anything, which means either the rat's name is older than the record or the human sense is the original one.
package (n.): 1530s, "the act of packing," from pack (n.) + -age; or from cognate Dutch pakkage "baggage." The main modern sense of "bundle, parcel" is first attested 1722. Package deal is from 1952.
package (v.): 1915, from package (n.). Related: Packaged; packaging.
packer (n.): mid-14c. (mid-13c. as a surname), agent noun from pack (v.).
packet (n.): mid-15c., from Middle English pak "bundle" (see pack (n.)) + diminutive suffix -et; perhaps modeled on Anglo-French pacquet (Middle French pacquet), which ultimately is a diminutive of Middle Dutch pak. A packet boat (1640s) originally was one that carried mails. Packet-switching attested from 1971.
packsaddle (n.): also pack-saddle, "saddle for supporting packs on the back of a mount," late 14c., pakke sadil; from pack (n.) + saddle (n.).
pact (n.): early 15c., from Old French pacte "agreement, treaty, compact" (14c.), from Latin pactum "agreement, contract, covenant," noun use of neuter past participle of pacisci "to covenant, to agree, make a treaty," from PIE root *pag- "fix, join together, unite, make firm" (cognates: Sanskrit pasa- "cord, rope," Avestan pas- "to fetter," Greek pegnynai "to fix, make firm, fast or solid," Latin pangere "to fix, to fasten," Slavonic paž "wooden partition," Old English fegan "to join," fon "to catch seize").
pad (n.): 1550s, "bundle of straw to lie on," possibly from or related to Low German or obsolete Flemish pad "sole of the foot," which is perhaps from PIE *pent- "to tread, go" (see find (v.)), but see path (n.). Meaning "cushion-like part of an animal foot" is from 1790 in English. Generalized sense of "something soft" is from c. 1700; the sense of "a number of sheets fastened together" (in writing pad, drawing pad, etc.) is from 1865.

Sense of "takeoff or landing place for a helicopter" is from 1960. The word persisted in underworld slang from early 18c. in the sense "sleeping place," and was popularized again c. 1959, originally in beatnik speech (later hippie slang) in its original English sense of "place to sleep temporarily."
pad (v.2): "to stuff, increase the amount of," 1827, from pad (n.); transferred to expense accounts, etc. from 1913. Related: Padded; padding. Notion of a padded cell in an asylum or prison is from 1862 (padded room).
pad (v.1): "to walk," 1550s, probably from Middle Dutch paden "walk along a path, make a path," from pad, pat "path." Originally criminals' slang, perhaps of imitative origin (sound of feet trudging on a dirt road). Related: Padded; padding.
padding (n.): "material used in stuffing," 1828, verbal noun from pad (v.2).
paddle (n.): c. 1400, padell "small spade," from Medieval Latin padela, of uncertain origin, perhaps from Latin patella "small pan, little dish, plate," diminutive of patina (see pan (n.)).

Meaning "short oar with a wide blade" is from 1620s. As an instrument used for beating clothes (and slaves, and schoolboys), it is recorded from 1828, American English. Paddle-ball attested from 1935.
paddle (v.1): "to dabble, wade in water," 1520s, probably cognate with Low German paddeln "tramp about," frequentative of padjen "to tramp, to run in short steps," from pad (v.). Related: Paddled; paddling. Meaning "to move in water by means of paddles" is a different word (see paddle (v.3)).
paddle (v.2): "to beat with a paddle, spank," 1856, from paddle (n.). Related: Paddled; paddling.
paddle (v.3): "to move in water by means of paddles," 1670s, from paddle (n.). To paddle one's (own) canoe "do for oneself" is from 1828.
paddle-wheel (n.): also paddlewheel, 1805, from paddle (n.) + wheel (n.).
paddock (n.1): "a frog, a toad," c. 1300, diminutive of pad "toad," from Old Norse padda; common Germanic (Swedish padda, Danish padde, Old Frisian and Middle Dutch padde "frog, toad," also Dutch schildpad "tortoise"), of unknown origin and with no certain cognates outside Germanic.
paddock (n.2): "an enclosure," 1620s, alteration of Middle English parrock, from Old English pearroc "enclosed space, fence" (see park (n.)). Or possibly from Medieval Latin parricus (8c.), which ultimately is from Germanic.