English definition of “sustain”
/səˈsteɪn/ verb [T]
CONTINUE › to cause or allow something to continue for a period of time: The team may not be able to sustain this level of performance.
SUPPORT › to support someone or something so that they can live or exist: The money he received was hardly enough to sustain a wife and five children.
sustain damage/injuries/losses formal › If someone or something sustains injuries/damage/losses, etc, they are injured/damaged, etc.: She later died in hospital of the injuries sustained in the accident.