How to Say "to tone" in Spanish
The most common Spanish word for “to tone” is “definir” — use 'definir' when you want to talk about making muscles visible or clearly shaping the body, as if outlining them..
definir
/deh-fee-neer//defiˈniɾ/

Examples
Hago yoga para definir mis músculos.
I do yoga to define my muscles.
Este gol va a definir el partido.
This goal is going to decide the game.
Ella hace pesas para definir sus brazos.
She lifts weights to tone her arms.
Debemos definir los límites de nuestra propiedad.
We must determine the boundaries of our property.
Resultative use
In sports, 'definir' refers to the action that finishes a play or determines who wins.
Determining vs. Defining
Mistake: “Tengo que definir si voy a la fiesta.”
Correction: Tengo que decidir si voy a la fiesta. While similar, 'definir' is used more for establishing boundaries or explaining, whereas 'decidir' is for personal choices.
fortalecer
/for-tah-leh-sehr//foɾtaleˈseɾ/

Examples
Levantar pesas ayuda a fortalecer tu cuerpo.
Lifting weights helps to strengthen your body.
Hago ejercicio todos los días para fortalecer mis músculos.
I exercise every day to strengthen my muscles.
Queremos fortalecer la amistad entre nuestros países.
We want to strengthen the friendship between our countries.
La nueva ley busca fortalecer la economía local.
The new law seeks to bolster the local economy.
The 'ZC' Rule
When a verb ends in '-ecer', the 'c' changes to 'zc' before an 'o' or an 'a'. This is why we say 'yo fortalezco' instead of 'fortaleco'.
Direct Objects
This verb usually needs a 'target' (a person or thing being strengthened). If that target is a specific person, remember to use the 'personal a', like in 'Quiero fortalecer a mi equipo'.
Forgetting the 'z'
Mistake: “Yo fortaleco mi espalda.”
Correction: Yo fortalezco mi espalda. Always add the 'z' in the 'yo' form of the present tense to keep the sound consistent.
Definir vs. Fortalecer
Related Translations
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