Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

also die-hard, 1844 (n.), in reference to the 57th Regiment of Foot in the British Army; as an adjective, attested from 1871; from die (v.) + hard (adv.). As a brand name of an automobile battery, DieHard, introduced by Sears in 1967.

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.