/
fə(ʊ)ˈmɛnt/
v.
  - instigate or stir up (revolution or strife).
 - archaic bathe (a part of the body) with warm or medicated lotions.
 
Derivative
- fomentation n.
  - fomenter n.
 
Etymology
ME: from Fr. fomenter, from late L. fomentare, from L. fomentum ‘poultice, lotion’.