|1.||to encourage or instigate (trouble, discord, etc); stir up|
|2.||med to apply heat and moisture to (a part of the body) to relieve pain and inflammation|
|[C15: from Late Latin fōmentāre, from Latin fōmentum a poultice, ultimately from fovēre to foster]|
|usage Both foment and ferment can be used to talk about stirring up trouble: he was accused of fomenting/fermenting unrest. Only ferment can be used intransitively or as a noun: his anger continued to ferment (not foment); rural areas were unaffected by the ferment in the cities|
fomentation fo·men·ta·tion (fō'mən-tā'shən, -měn-)
A substance or material used as a warm, moist medicinal compress; a poultice.
The therapeutic application of warmth and moisture, as to relieve pain.