wilt1
  
  v.
  - (of a plant) become limp through loss of water, heat, or disease; droop. 
▸(of a person) lose one's energy or vigour.
 - leave (mown grass or a forage crop) in the open to dry partially before being collected for silage.
 
n.
 any of a number of fungal or bacterial diseases of plants characterized by wilting of the foliage.
 
  Etymology
  C17 (orig. dial.): perh. an alt. of dial. welk ‘lose freshness’, of Low Ger. origin.
 
  
    
wilt2
  
  archaic second person singular of will1.