This is the 366th most frequent Spanish word.
mantiene
"Maintains" or "keeps."
In this sentence, 'mantiene' means 'keeps' or 'upholds', indicating the action of staying true to a commitment or promise.
Él mantiene su promesa a pesar de las dificultades.
He keeps his promise despite the difficulties.
Here, 'mantiene' is used reflexively as 'se mantiene', meaning 'remains', to describe a state or condition being sustained.
Ella se mantiene tranquila durante la prueba.
She remains calm during the test.
In this context, 'mantiene' conveys the idea of staying unchanged or solid, as in a physical sense of steadiness or stability.