preempt的词源

英文词源

pre-empt (v.): also preempt, 1830, "secure by pre-emtion," back-formation from pre-emption, originally American English. In the broascasting sense, it is attested from 1965, American English, a euphemism for "cancel." Related: pre-empted; preempted.
pre-emption (n.): also preemption, c. 1600, literally "the right of purchasing before others," from pre- "before" + emption.
pre-emptive (adj.): also preemptive, 1806, "pertaining to preemption;" from pre-emption + -ive. Specifically of an attack on an enemy who is plotting his own attack, 1958, a term from the Cold War. Related: Pre-emptively; preemptively.
pre-emptory (adj.): also preemptory, 1822, "relating to pre-emption," from pre-emption + -ory.

词根词缀： pre-前,先 + -empt-拿,买

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