simmering
adjective[not gradable]
us/ˈsɪm·ər·ɪŋ/cookingat atemperaturethat isslightlybelowboiling:
apotof simmeringwater
fig.Something that is simmering iscontrolledbut mayburstout at anytime, oftenviolently:
simmering tensions
The simmeringcontroversynowappearsto be coming to an end.