disappear in WordNet English dictionary

1. get lost, as without warning or explanation
   "He disappeared without a trace"
   disappear  vanish  go away 
   
2. cease to exist
   "An entire civilization vanished"
   vanish  disappear 
   
3. become less intense and fade away gradually
   "her resistance melted under his charm"; "her hopes evaporated after years of waiting for her fiance"
   melt  disappear  evaporate 
   
4. become invisible or unnoticeable
   "The effect vanished when day broke"
   vanish  disappear  go away