How to Say "sluggish" in Spanish
The most common Spanish word for “sluggish” is “lento” — use 'lento' when referring to the slow performance of technology, systems, or processes..
lento
LEN-toh/'len.to/

Examples
Mi conexión a internet está muy lenta hoy, no puedo descargar nada.
My internet connection is very sluggish today, I can't download anything.
Es un poco lento para captar las indirectas.
He is a bit slow to get the hints.
Permanent vs. Temporary Slowness
Mistake: “Using *estar* for inherent mental slowness (e.g., *Mi hijo está lento*).”
Correction: If you mean a person is naturally slow-witted, use *ser*: *Mi hijo es lento*. Use *estar* only to describe a temporary condition, like a slow internet connection (*Mi wifi está lenta*).
perezoso
/peh-reh-SOH-soh//peɾeˈsoso/

Examples
Mi hermano es muy perezoso y nunca limpia su habitación.
My brother is very lazy and never cleans his room.
Hoy me siento un poco perezoso, no quiero ir al gimnasio.
I feel a bit lazy today, I don't want to go to the gym.
Tuvimos un domingo perezoso viendo películas en el sofá.
We had a lazy Sunday watching movies on the couch.
Matching the Person
Since this is an adjective, you must change the ending to 'perezosa' if you are describing a woman or a feminine object.
Ser vs. Estar
Use 'ser' if laziness is a permanent part of someone's personality. Use 'estar' if someone is just feeling lazy at this particular moment.
Lazy vs. Slow
Mistake: “Using 'perezoso' to mean a car is slow.”
Correction: Use 'lento' for speed. 'Perezoso' describes a lack of motivation, not physical speed.
Person vs. Performance
Related Translations
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