Etymology
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tae kwon do 
1967, from Korean, said to represent tae "kick" + kwon "fist" + do "art, way, method."
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tai chi (n.)
1736, the "supreme ultimate" in Taoism and Neo-Confucianism, from Chinese tai "extreme" + ji "limit." As the name of a form of martial arts training (said to have been developed by a priest in the Sung dynasty, 960-1279) it is first attested 1962, in full, tai chi ch'uan, with Chinese quan "fist."
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