faithful to
Il est resté fidèle à ses principes.
He remained true to his principles.
Il a été fidèle à sa promesse.
He kept his promise.
Il a toujours été fidèle à sa femme.
He was always faithful to his wife.
Le plus lent à promettre est toujours le plus fidèle à tenir.
The slowest to promise is always the most faithful to keep.
On dit que cette traduction est fidèle à l'originale.
They say that this translation is faithful to the original.
La traduction est fidèle à l'original.
The translation is faithful to the original.