1. to keep something in good condition or preserve something with loyalty and dedication
She faithfully maintained her garden for over thirty years.
Ela manteve fielmente seu jardim por mais de trinta anos.
2. to continue to support or uphold something with unwavering commitment
The organization faithfully maintains its founding principles.
A organização mantém fielmente seus princípios fundadores.
3. to keep up with regular care, repairs, or attention to ensure proper functioning
He faithfully maintains his vehicle with regular service appointments.
Ele mantém fielmente seu veículo com serviços regulares.