simmer

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simmer

[′sim·ər]
(engineering)
The detectable leakage of fluid in a safety valve below the popping pressure.
References in periodicals archive ?
The very public legal dispute between left-wing TV host Keith Olbermann and his former employer, Current TV, is showing no signs of simmering down.
The quarrel between Mars and Pluto, is simmering down, but there could be someone who remains a very alluring figure to you, but as much as they may set your pulse racing, whether they would turn out to have a longer term role to play, is another thing.