Pertaining to fideism.

A subscriber to fideism.

Faithful / (acoustics) Having high fidelity.

In a fideistic way.

A male given name from Spanish / A surname from Spanish.

(law) A surety; one bound for another, conjointly with him; a guarantor.

(rhetoric) A fallacious argument that asserts the truth of a proposition by an appeal to pious testimony or religious revelation.

plural of argumentum ad fidem

(law) The act or state of being bound as surety for another; suretyship.

plural of fidejussor