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in terrorem clause

American  
[in te-rawr-em klawz] / ɪn tɛˈrɔr ɛm ˌklɔz /

noun

Law.
  1. a clause in a will stating that a beneficiary who contests the will shall lose their legacy.


Etymology

Origin of in terrorem clause

From Latin in terrōrem “into terror,” i.e., by intimidation, by way of warning