Faithful

"Faithful" in Latin

fidelis

(having faith)

fidus

(loyal; adhering firmly to person or cause)

fidus

(having faith)

fidus

(reliable; worthy of trust)

fidēlis

(loyal; adhering firmly to person or cause)

fidēlis

(reliable; worthy of trust)

firmus

(loyal; adhering firmly to person or cause)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.