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late 15c., in chess, "to attack the king; to put (the opponent's king) in check;" earlier (late 14c.), "to stop, arrest; block, barricade;" see check (n.1). A player in chess limits his opponent's ability to move when he places his opponent's king in check. All the other senses seem to have developed from the chess sense: "To arrest, stop;" then "to hold in restraint" (1620s); and finally "to hold up or control" (an assertion, a person, etc.) by comparison with some authority or record, 1690s. Hence, to check off (1839); to check up (1889); to check in or out (in a hotel, of a library book, etc., by 1918). To check out (something) "to look at, investigate" is from 1959. Related: Checked; checking.[check etymology, check origin, 英语词源]