Etymology
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unarmed (adj.)

c. 1300, "with armor removed," from un- (1) "not" + armed, or else past-participle adjective from unarm "strip of armor" (c. 1300), from un- (2) "opposite of" + arm (v.). Meaning "not fitted to attack, weaponless" is from late 14c.

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armless (adj.)

late 14c., of physical conditions, from arm (n.1) + -less. The meaning "without weapons" is attested from 1610s (from arm (n.2)), but that sense more typically is expressed by unarmed or disarmed.

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karate (n.)

system of unarmed combat using hands and feet, 1947, Japanese, literally "empty hand, bare hand," from kara "empty" + te "hand." As a verb from 1963. A devotee is a karateka. Karate-chop (n.) is attested from 1964.

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