sap (someone's) will

Translations
подрывать волю (кого-то)
The constant failures sapped his will to continue.
Постоянные неудачи подрывали его волю продолжать.
Definitions
To sap someone's will means to weaken or diminish their determination, resolve, or desire to act, often through persistent pressure, discouragement, or emotional exhaustion.
Words
sap

verb
истощать