出典:Wiktionary
Calque of French extimité + English -cy (suffix forming nouns of condition, quality, または state). Extimité was coined by the French psychiatrist and psychoanalyst Jacques Lacan (1901–1981) in 1959–1960),[1][2] probably from a blend of French externe (“external”) + intimité (“closeness, intimacy”).
extimacy (countable かつ uncountable, 複数形 extimacies)