source: https://demigodxtonio.tumblr.com/post/166611981122

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.

early 17th century: from Italian, from Latin Volcanus ‘Vulcan’.