| 词汇 | pre-emption |
| 词根词缀 | 词源： c.1600, also preemption, lit. "the right of purchasing before others," from pre- "before" + L. emptionem (nom. emptio) "buying," from emere "to buy" (see exempt). Pre-empt (v.) is an 1855 back formation, originally Amer.Eng. In the broascasting sense, it is attested from 1965, Amer.Eng., a euphemism for "cancel." |
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