She had felt young and dissipated, had thought rather well of her black and leaf-green suit, but as she watched them, thin of ankle, soft under the chin, seventeen or eighteen at most, smoking cigarettes with the correct ennui and talking of "bedroom farces" and their desire to "run up to New York and see something racy," she became old and rustic and plain, and desirous of retreating from these hard brilliant children to a life easier and more sympathetic.
There are no more uses of "dissipate" in the book.
Show samples from other sources
Airborne radiation dissipates over time and distance.
Everyone is frightened right now, but the fear will eventually dissipate.