Crez
kreɪŋsæ butʃ kres az a stroŋʒer koŋnoteɪʃɐ̃ŋ of iŋner koŋviktʃioŋ ɐ̃ŋd a peɾəsonaʊ kɔdʒj of koŋduktʃ a frazy liky kreɪŋsæ profũŋdæ wowld by needed
In Portuguese Crença, but 'crez' has a stronger connotation of inner conviction and a personal code of conduct, a phrase like 'crença profunda' would be needed.
A deeply held belief or conviction, often related to faith, values, or principles.
Example
"Și-a păstrat crezul chiar și în momente dificile."