One of the mysteries of the English language finally explained.
Philosophy and Theology (a) Having the attribute of believing; capable of belief; (b) of or relating to belief; of the nature of belief or intellectual assent.
Diplomatic. A credential letter. Compare "credential". Now historical and rare.
Mid 17th century (in an earlier sense). From post-classical Latin creditivus that gives credence, that believes from classical Latin crēdit-, past participial stem of crēdere to believe + -īvus.
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