n.
  - a strong-smelling underground fungus that resembles a rough-skinned potato, considered a culinary delicacy. 
[Family Tuberaceae.]
 - a soft sweet made of a chocolate mixture.
 
v.
 
[
usu. as noun truffling]
 hunt for truffles.
 
  Etymology
  C16: prob. via Du. from obs. Fr. truffle, perh. based on L. tubera, pl. of tuber ‘hump, swelling’.