How to Say "microwave oven" in Spanish
The Spanish word for “microwave oven” is “microondas” — A1 level. This is a very common word in everyday Spanish.

Examples
Calienta la sopa en el microondas.
Heat the soup in the microwave.
Mi microondas es muy viejo y no funciona bien.
My microwave is very old and doesn't work well.
No metas recipientes de metal en el microondas.
Do not put metal containers in the microwave.
One or Many? It stays the same!
Even though this word ends in 's', it is used for just one microwave. To talk about more than one, you only change the 'el' to 'los'. One is 'el microondas' and two are 'los microondas'.
It's a 'He' Word
Even though 'onda' (wave) is usually feminine, the appliance 'microondas' is always masculine. Always use 'el' or 'un' with it.
Don't drop the 's'
Mistake: “un microonda”
Correction: un microondas. In Spanish, some words naturally end in 's' even in their singular form. Think of it like the English word 'species'.
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