volcano
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noun (plural volcanoes or volcanos)
a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
火山; 噴火口
an intense suppressed emotion or situation liable to burst out suddenly:
(今にも爆発しそうな)抑圧された感情［状況］
e.g. what volcano of emotion must have been boiling inside that youngster.
ORIGIN
early 17th century: from Italian, from Latin Volcanus ‘Vulcan’.