Spanish -mente adverbs: turning adjectives into adverbs

To make an adverb of manner in Spanish, take the feminine singular form of an adjective and add -mente: rápido → rápida → rápidamente. It is the exact equivalent of English “-ly”, turning a describing word into one that says how something is done. So rápida (“quick”) becomes rápidamente (“quickly”), and lenta (“slow”) becomes lentamente (“slowly”).

The one detail to remember is which form of the adjective to start from: always the feminine, never the masculine. If the adjective has no separate feminine form, you just add -mente as it is.

How to form -mente adverbs

Start from the feminine singular of the adjective, then attach -mente. For adjectives ending in -o, switch to the feminine -a first: claro → clara → claramente.

Conduce lentamente.
He drives slowly.

Habla claramente.
She speaks clearly.

Adjectives ending in -e or a consonant

Many adjectives have no separate masculine and feminine form: those ending in -e (like triste) or in a consonant (like fácil, normal). With these there is no gender change to make, so you simply add -mente: fácil → fácilmente, normal → normalmente, feliz → felizmente, triste → tristemente.

Lo encontré fácilmente.
I found it easily.

Normalmente como en casa.
I usually eat at home.

Keeping the accent

If the adjective carries a written accent, the adverb keeps it in the same place: rápida → rápidamente, fácil → fácilmente, común → comúnmente. The rule is simply to preserve whatever accent the adjective already had — do not drop it just because the word grew longer.

Habla rápidamente.
He speaks quickly.

Two adverbs in a row

When you join two -mente adverbs, only the last one keeps -mente. The first drops back to the bare feminine adjective.

Habla lenta y claramente.
He speaks slowly and clearly.

Lo hizo rápida y fácilmente.
She did it quickly and easily.

Note that not every adverb is built with -mente. Some of the most common ones have their own forms: bien (well), mal (badly), muy (very), despacio (slowly), and así (like this). The adverbs bien and mal are the irregular ones from bueno and malo — there is no buenamente, so see bueno vs bien for how those work.

Common mistakes

Adding -mente to the masculine form

The base is always the feminine adjective, not the masculine -o form.

rápidomente → rápidamente
quickly
Start from the feminine rápida, then add -mente.

Dropping the adjective’s accent

If the adjective had a written accent, the adverb keeps it.

rapidamente → rápidamente
quickly
Rápida has an accent, so rápidamente keeps it.

facilmente → fácilmente
easily
Fácil has an accent, so fácilmente keeps it.

Keeping -mente on both coordinated adverbs

With two adverbs together, only the second one keeps -mente.

lentamente y claramente → lenta y claramente
slowly and clearly
The first adverb drops to the bare feminine lenta.

Unlike the adjectives you match for gender and number in adjective placement, -mente adverbs are invariable: they never agree with anything. Rápidamente stays rápidamente whether the subject is masculine, feminine, singular, or plural.

In Fluera you build whole sentences, so choosing rápida as the base and placing rápidamente naturally becomes a reflex instead of a rule you recite. Try it when you practice Spanish and the -mente ending will start to feel automatic.

Practice