The English word faith is thought to date from 1200–50, from the Middle English feith, via Anglo-French fed, Old French feid, feit from Latin fidem, accusative of fidēs (trust), akin to fīdere (to trust).[2]
The word faith is sometimes used as a synonym for hope.
Faith is usually considered a rather stable state of being, but should not be mixed up with Fidelity (as might be implied e.g. from the word Faithfulness).