Etymology
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barter (v.)
"to traffic or trade by exchanging one commodity for another," mid-15c., apparently from Old French barater "to barter, cheat, deceive, haggle" (also, "to have sexual intercourse"), 12c., which is of uncertain origin, perhaps from a Celtic language (compare Irish brath "treachery"). Connection between "trading" and "cheating" exists in several languages. Related: Bartered; bartering.

As a noun, "act of exchanging, commerce by exchange of commodities" (rather than buying and selling for money), 1590s, from the verb.
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away (adv.)
late Old English aweg, earlier on weg "on from this (that) place;" see a- (1) + way (n.).

Meaning "from one's own or accustomed place" is from c. 1300; that of "from one state or condition to another" is from mid-14c.; that of "from one's possession (give away, throw away) is from c. 1400. Colloquial use for "without delay" (fire away, also right away) is from earlier sense of "onward in time" (16c.). Meaning "at such a distance" (a mile away) is by 1712. Intensive use (as in away back) is American English, attested by 1818. Of sporting events played at the other team's field or court, by 1893.
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lay-away (n.)
also lay-away, 1961 in reference to a system of payments for reserved merchandise, from the verbal phrase (attested from c. 1400 as "to put away," especially "place in store for future use"); see lay (v.) + away (adv.). Earlier in the same sense, as an adjective, was Australian lay-by (1930).
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get-away (n.)
also getaway, 1852, "an escape," originally in fox hunting, from verbal phrase get away "escape" (early 14c.); see get (v.) + away (adv.). Of prisoners or criminals from 1893.
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keep-away (n.)
as a game, 1925, from verbal phrase (attested from late 14c.); see keep (v.) + away (adv.).
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give-away (n.)
also giveaway, "act of giving away," 1872, from verbal phrase give away, c. 1400 (of brides from 1719); see give (v.) + away (adv.). The phrase in the meaning "to betray, expose, reveal" is from 1878, originally U.S. slang. Hence also Related: give-away (n.) "inadvertent betrayal or revelation" (1882).
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far-away (adj.)
also faraway, "distant, remote," 1816, from far + away.
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cut-away (adj.)

of coats, "cut back from the waist," 1841, from the verbal phrase; see cut (v.) + away. As a noun, "coat cut back from the waist," by 1849. In reference to models, drawings, etc., of which a part is cut away to reveal the interior, by 1946. The verbal phrase is from c. 1300 as "cut (something) off or away." 

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truck (v.1)
"to exchange, barter," early 13c., from Old North French troquer "to barter, exchange," from Medieval Latin trocare "barter," of unknown origin. Rare before 16c. Sense of "have dealings with" is first recorded 1610s. The noun is first recorded 1550s, "act or practice of barter." Sense of "vegetables raised for market" is from 1784, preserved in truck farm (1866).
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exchange (v.)

late 15c. (Caxton), in commerce, "to part with in return for some equivalent, transfer for a recompense, barter," from Old French eschangier "exchange, barter" (Modern French échanger), from Vulgar Latin *excambiare (source of Italian scambiare); see exchange (n.). Non-commercial sense of "to give and receive reciprocally" is from c. 1600. Related: Exchanged; exchanging.

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