The quality or state of being estranged; the condition of feeling distant, alienated, or separated from someone or something.
From estranged (past participle of estrange) + -ness suffix forming abstract nouns. Estrange comes from Old French estrangier, from Latin extraneus (foreign).
Estrangedness captures something lonelier than simple distance—it's the particular sadness of knowing someone well once and now feeling they're a stranger, as if the closeness itself makes the separation hurt more.
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