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)
   "The popularity of the show began to wane after its fifth season";
   - ebb, ebbing

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

Derived forms: waned, wanes, waning

Type of: come down, decline, decrease, dent, diminish, diminution, fall, go down, lessen, sink

Antonym: full, rise

Encyclopedia: Wane