to gradually become or make something become weaker until it disappears (Oxford)
2. to (cause to) gradually disappear or waste (Cambridge)
Her laughter soon dissipated the tension in the air. (Oxford)
She was determined to achieve results and not to dissipate her energies. (Oxford)
her laughter soon dissipated the tension
not to dissipate energies
Deplete
Use up
Save
Accumulate
Dissipation