How to Say "razor" in Spanish
The Spanish word for “razor” is “cuchilla” — A2 level. This is a very common word in everyday Spanish.

Examples
Necesito una cuchilla nueva porque esta ya no corta bien.
I need a new razor because this one doesn't cut well anymore.
La cuchilla del sacapuntas se ha oxidado.
The pencil sharpener blade has rusted.
Ten cuidado al cambiar la cuchilla de la cortadora.
Be careful when changing the mower blade.
Don't be fooled by the 'o'
While 'cuchillo' is the whole knife (masculine), 'cuchilla' refers to just the blade or a razor (feminine). Always use 'la' or 'una'.
Kitchen Knife vs. Blade
Mistake: “Using 'cuchilla' when you want to ask for a knife to eat steak.”
Correction: Use 'cuchillo' for a table knife. 'Cuchilla' usually implies a specialized tool blade or a razor.
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