Spanish vocabulary · Beginner

Weak in Spanish: How to Use Débil

Débil · adjective · DEH-beel

Weak in Spanish is débil, an adjective used for people, signals, and arguments. It doesn't change for gender (ends in a consonant), and the plural is débiles.

Débil is DEH-beel, stressed on the first syllable.

Me siento débil después de la gripe.

I feel weak after the flu.

Weak in Spanish: Quick Reference

Below are the most common Spanish words for weak, with pronunciation and regional usage notes.

SpanishEnglishPronunciationRegion / Register
débilweakDEH-beelDefault, widely understood
debilidadweakthe noun: weakness
flojoweakweak / slack (informal, regional)

How Native Speakers Use Débil

Real example sentences across three contexts you'll actually run into.

Physically

Me siento débil después de la gripe.

I feel weak after the flu.

Sentirse débil for physical weakness.

A faint signal

La señal del wifi está muy débil aquí.

The wifi signal is very weak here.

Débil works for signals too.

An argument

Es una excusa débil y nadie la cree.

It's a weak excuse and nobody believes it.

Figurative, weak reasoning.

Avoid These Mistakes When Using Débil

Adding -o or -a to débil

Incorrect: un niño débilo

Correct: un niño débil

Débil ends in a consonant and doesn't change for gender (un hombre débil, una mujer débil); only the plural adds -es (débiles).

Confusing débil with delgado

Incorrect: Es muy débil, pesa cuarenta kilos.

Correct: Es muy delgado, pesa cuarenta kilos.

Débil means weak (lacking strength), while thin or slim is delgado or flaco, since being thin doesn't mean being weak.

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See Débil used by native speakers

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Common Questions About Weak in Spanish

How do you say weak in Spanish?
Weak in Spanish is débil (DEH-beel), an adjective for people, signals, and arguments, with the plural débiles.
What is the noun for weakness?
The noun is debilidad, and tener debilidad por algo can also mean to have a soft spot for something.
How do I say to get weaker?
Use debilitarse, as in la señal se debilita (the signal is getting weaker) or se debilitó tras la operación.