Etymology
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dual (adj.)

c. 1600, in grammar, "the form or number relating to two," from Latin dualis "that contains two; the dual number, duality," from duo "two" (from PIE root *dwo- "two"). General sense of "relating to two, expressing two, composed or consisting of two parts" is from 1650s. Related: Dually.

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career (n.)

1530s, "a running (usually at full speed), a course" (especially of the sun, etc., across the sky), from French carriere "road, racecourse" (16c.), from Old Provençal or Italian carriera, from Vulgar Latin *(via) cararia "carriage (road), track for wheeled vehicles," from Latin carrus "chariot" (see car). The sense of "general course of action or movement" is from 1590s, hence "course of one's public or professional life" (1803).

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marriage (n.)
Origin and meaning of marriage

c. 1300, mariage, "action of entering into wedlock;" also "state or condition of being husband and wife, matrimony, wedlock;" also "a union of a man and woman for life by marriage, a particular matrimonial union;" from Old French mariage "marriage; dowry" (12c.), from Vulgar Latin *maritaticum (11c.), from Latin maritatus, past participle of maritare "to wed, marry, give in marriage" (see marry (v.)). The Vulgar Latin word also is the source of Italian maritaggio, Spanish maridaje, and compare mariachi.

Meanings "the marriage vow, formal declaration or contract by which two join in wedlock;" also "a wedding, the celebration of a marriage; the marriage ceremony" are from late 14c. Figurative use (non-theological) "intimate union, a joining as if by marriage" is from late 14c.

[W]hen two people are under the influence of the most violent, most insane, most delusive, and most transient of passions, they are required to swear that they will remain in that excited, abnormal, and exhausting condition until death do them part. [G.B. Shaw, preface to "Getting Married," 1908]

Marriage counseling is recorded by that name by 1939. Marriage bed, figurative of marital intercourse generally, is attested from 1580s (bed of marriage is from early 15c.).

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career (v.)

1590s, "to charge at a tournament," from career (n.). The meaning "move rapidly, run at full speed" (1640s) is from the image of a horse "passing a career" on the jousting field, etc. Related: Careered; careering.

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guidance (n.)

1530s, "the process of directing conduct," hybrid from guide (v.) + -ance; replacing 15c. guying. In reference to direction in school, career, marriage, etc., from 1927.

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careerist (n.)

"person intent on the furtherance of his working or professional career," 1906, from career (n.) + -ist. Related: Careerism.

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remarriage (n.)

also re-marriage, "any marriage after the first," 1610s, from re- "again" + marriage (n.).

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superwoman (n.)

1906, as female equivalent of superman in the Nietzschean sense. From 1976 in the sense of "one who successfully combines career and motherhood."

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agamy (n.)

"non-recognition of marriage" (by a state, etc.), from Greek a- "not" (see a- (3)) + -gamia, from gamos "marriage" (see gamete).

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matrimonial (adj.)

mid-15c., "of or pertaining to marriage, connubial, nuptial," from Old French matrimonial (14c.) and directly from Late Latin matrimonialis, from Latin mātrimōnium "wedlock, marriage" (see matrimony). Earlier as a noun meaning "a marriage" (late 15c.). Related: Matrimonially.

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