ebullition

noun

Etymology: From Old French ebullition, from Latin ēbullītiō, from ēbulliō (“to boil”).

1. The act of boiling.

   “It overflows at one point and forms a little stream of hot water, which at a hundred yards' distance is still too hot to hold the hand in. A little further on, in a piece of rough wood, were two other springs not so regular in outline, but appearing to be much hotter, as they were in a continual state of active ebullition.”

   “Suddenly, and at the same moment, the ebullition ceased, and the compound changed to a dark purple, which faded again more slowly to a watery green.”

2. A sudden emotional outburst.

   “His threats—his severe exclamations were but ebullitions of keen vexation, of agony of mind.”

   “Having vented the first ebullition of his wrath, he despatched a message demanding the surrender of the corporal […].”