How to Say "passionate" in Spanish
The most common Spanish word for “passionate” is “ardiendo” — use 'ardiendo' to describe a physical sensation of intense heat, often related to fever or a burning feeling..
ardiendo
/ar-DYEN-doh//aɾˈðjen̪.do/

Examples
Tenía la frente ardiendo por la fiebre.
His forehead was burning hot from the fever.
Sus palabras estaban ardiendo de rabia.
His words were blazing with rage (were full of intense anger).
El sol estaba ardiendo al mediodía.
The sun was scorching (burning hot) at noon.
Describing Intensity
When used as an adjective, 'ardiendo' often emphasizes extreme heat or extreme emotion, acting like an intensifier for the noun it modifies.
caliente
/ka-lyen-te//kaˈljente/

Examples
Es una persona de sangre caliente, se enoja con facilidad.
He's a hot-blooded person, he gets angry easily.
El entrenador se puso caliente con el árbitro por la mala decisión.
The coach got angry with the referee for the bad call.
En la película, el personaje principal es un amante muy caliente y apasionado.
In the movie, the main character is a very hot and passionate lover.
intenso
een-TEHN-soh/inˈtenso/

Examples
Ella tiene sentimientos muy intensos sobre la justicia social.
She has very intense feelings about social justice.
Es una persona muy intensa; siempre está pensando en el futuro.
He is a very intense person; he's always thinking about the future (meaning deeply focused/serious).
Tuvieron un debate intenso sobre política.
They had an intense debate about politics.
Using Ser vs. Estar
Since 'intenso' usually describes a core characteristic (like a personality trait or inherent strength), it almost always uses the verb 'ser' (e.g., 'Ella es intensa').
encendido
en-sen-DEE-doh/ensenˈdiðo/

Examples
Tuvieron una discusión muy encendida sobre política.
They had a very heated discussion about politics.
Su rostro estaba encendido por la vergüenza.
Her face was flushed (red) with shame.
Figurative Meaning
Just like a fire can be 'lit,' emotions or arguments can be 'lit up' or 'heated.' This meaning is used for intense feelings or discussions.
ardiente
ar-DYEN-teh/aɾˈðjen.te/

Examples
Mostró un deseo ardiente de ganar la competencia.
He showed a passionate desire to win the competition.
Ella es una defensora ardiente de los derechos humanos.
She is a fervent/passionate defender of human rights.
Gender Invariable
This adjective always ends in '-e', meaning it describes both masculine nouns (deseo ardiente) and feminine nouns (pasión ardiente) without changing.
Mistaking Physical Heat for Emotional Intensity
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