'Creed' fossilised the Latin verb 'credo' (I believe) — a first-person declaration turned into a noun.
A system of Christian or other religious belief; a set of beliefs or aims that guide someone's actions; a formal statement of faith.
From Old English 'crēda,' a direct borrowing of Latin 'crēdō' (I believe), the first word of the Apostles' Creed and the Nicene Creed ('Crēdō in Deum Patrem omnipotēntem' — I believe in God the Father almighty). From Latin 'crēdere' (to believe, to trust, to entrust), from PIE *ḱred-dheh₁- (literally 'to place one's heart' — *ḱerd-, heart + *dheh₁-, to put, to place). This vivid compound means that belief is an act of committing one's heart. The same root produced Latin 'credit' (that which is entrusted), 'credentials,' 'credulous,' 'credible,' and 'miscreant' (
The word 'creed' is one of the earliest Latin loanwords in Old English, entering the language with Christianity itself in the seventh century. It is unusual in being derived not from a Latin noun or adjective but from a first-person verb form — 'crēdō' (I believe). The entire word is literally 'I believe,' fossilized as a noun. English 'credo' is a later re-borrowing of the same Latin word, used for a personal or organizational statement of principles.