WordWeb Online

1. Grow smaller
   "Interest in the project waned";
   - decline, go down
    
2. Become smaller
   "Interest in his novels waned"
    
3. Decrease in phase
   "the moon is waning"

1. A gradual decline (in size, strength, power or number)
   - ebb, ebbing

Sounds like: Wales, wales, wails, w, wane, wain

Derived forms: waned, wanes, waning

Type of: decline, decrease, diminish, diminution, fall, lessen

Antonym: wax