Past tense of alien (archaic); to transfer property or rights; or to make someone feel alienated or estranged.
From alien used as a verb, from the noun alien (foreigner, from Latin alienus). The past tense uses the regular -ed ending.
In old English legal texts, 'aliened' describes property changing hands—a farmer might 'alien' their land to a lord, showing how verbs about foreign otherness got borrowed to describe transferring ownership.
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