/ fəʊˈment; NAmE foʊ-/ verb
[ vn ] ( formal ) to create trouble or violence or make it worse
SYN incite :
They accused him of fomenting political unrest.
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WORD ORIGIN
late Middle English (originally meaning to bathe with warm or medicated lotions): from French fomenter , from late Latin fomentare , from Latin fomentum poultice, lotion, from fovere to heat, cherish.