How to Say "hateful" in Spanish
The Spanish word for “hateful” is “odioso” — B1 level. This is a very common word in everyday Spanish.

Examples
Mi hermano pequeño puede ser muy odioso a veces.
My little brother can be very annoying sometimes.
No seas odioso y deja de burlarte de él.
Don't be obnoxious and stop making fun of him.
Limpiar el baño es una tarea odiosa.
Cleaning the bathroom is an unpleasant task.
Matching the Person
This word changes its ending based on who you are describing: use 'odioso' for a male and 'odiosa' for a female.
Using with 'Ser'
We usually use this word with 'ser' (to be) because being annoying is seen as a personality trait or a characteristic of a thing.
Mistaking it for 'Hating'
Mistake: “Using it to say you hate something (e.g., 'Soy odioso el brócoli').”
Correction: Say 'Odio el brócoli' (I hate broccoli). 'Odioso' describes the thing being hated, not the person who is feeling the hate.
Related Translations
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