GIMP is a 4 letter word that starts with G.

1. \Gimp\, a. [W. gwymp fair, neat, comely.]
   Smart; spruce; trim; nice. [Obs. or Prov. Eng.]
   
   

2. \Gimp\, n. [OF. guimpe, guimple, a nun's wimple, F. guimpe,
   OHG. wimpal a veil G. wimpel pennon, pendant. See {Wimple},
   n.]
   A narrow ornamental fabric of silk, woolen, or cotton, often
   with a metallic wire, or sometimes a coarse cord, running
   through it; -- used as trimming for dresses, furniture, etc.
   
         Gimp nail, an upholsterer's small nail.
   
   

3. \Gimp\, v. t.
   To notch; to indent; to jag.