1. providing support, nourishment, or strength

1. present participle of sustain; supporting, maintaining, or keeping something going

Examples

• The sustaining walls of the building were reinforced with steel.
• She ate a sustaining breakfast before the long hike.
• The charity is sustaining families through difficult times.
• His sustaining faith helped him through the crisis.
• The sustaining notes of the violin filled the concert hall.
• Regular exercise is sustaining her energy levels.
• The sustaining power of friendship cannot be underestimated.