How do you say "radiator" in Japanese?

ラジエーター is romanised as rajiētā. Say it roughly like "rah-jee-eh-eh-tah-ah" in English. Each Japanese syllable has even weight, so keep the rhythm steady.

ラジエーター is a neutral, everyday word that works in both casual and polite speech. The level of formality comes from the sentence structure around it, not from the word itself.

ラジエーター is written using katakana. Rajiētā is katakana for radiator from English, referring to heating radiators in homes and vehicles..

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