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

Examples
Después del accidente, el conductor quedó inconsciente por unos minutos.
After the accident, the driver remained unconscious for a few minutes.
Ella fue completamente inconsciente del peligro que corría.
She was completely unaware of the danger she was running.
Fue un error inconsciente; no quise ofender a nadie.
It was an unconscious (unintentional) mistake; I didn't mean to offend anyone.
Always Stays the Same
Unlike most adjectives, 'inconsciente' doesn't change based on gender (it's used for both masculine and feminine nouns). It only changes to plural: 'inconscientes'.
Ser vs. Estar
Use 'estar' (to be) to talk about the temporary state of being knocked out: 'El paciente está inconsciente.' Use 'ser' (to be) less often, usually for describing a person's general lack of awareness.
Accidentally Changing Gender
Mistake: “La mujer inconscienta.”
Correction: La mujer inconsciente. Remember, this adjective doesn't end in -o/-a, so it doesn't change its ending for gender.
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.