How to Say "unprotected" in Spanish
The Spanish word for “unprotected” is “indefenso” — B1 level.

Examples
El pequeño gatito se veía muy indefenso en medio de la tormenta.
The little kitten looked very helpless in the middle of the storm.
Sin sus herramientas, el mecánico se sentía indefenso ante el motor roto.
Without his tools, the mechanic felt defenseless before the broken engine.
Las leyes actuales dejan a los consumidores indefensos ante los grandes bancos.
Current laws leave consumers defenseless against big banks.
Matching the Gender
Since this is an adjective, you must change the ending to match the person or thing you are describing. Use 'indefenso' for a male/masculine object and 'indefensa' for a female/feminine object.
Using 'Estar' vs 'Sentirse'
We usually use this word with 'estar' (to be) to describe a current state of lack of protection, or 'sentirse' (to feel) to describe the emotion of being vulnerable.
Don't confuse with 'Harmless'
Mistake: “Ese perro no muerde, es indefenso.”
Correction: Ese perro no muerde, es inofensivo.
Related Translations
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