caldera
boiler
noun kahl-DEH-rah Rare
Origin: From Latin caldaria (hot-water vessel), from calidus (hot).
Also means
cauldron
Usage Note
Caldera covers a domestic or industrial boiler (caldera de gas), a large cauldron for cooking (la caldera de las brujas), and in geology a volcanic caldera. English borrowed the geological term directly. In Spain, caldera in a home refers to the central-heating boiler; in parts of Latin America, calentador is preferred for a water heater.
Examples
"Hay que revisar la caldera antes del invierno."
Natural Translation
The boiler needs to be checked before winter.

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