How to Say "blindly" in Spanish
The most common Spanish word for “blindly” is “ciegas” — use 'ciegas' when performing an action without seeing or knowing what is happening, often implying trust or lack of information..
ciegas
/SYEH-gahs//ˈsje.ɣas/

Examples
Confío en mi hermana a ciegas.
I trust my sister blindly.
Caminaba a ciegas por el pasillo oscuro.
I was walking blindly through the dark hallway.
Fixed Phrases
In the phrase 'a ciegas,' the word never changes to 'ciegos,' even if a man is speaking. It is a set expression.
oscuras
ohs-KOO-rahs/osˈku.ɾas/

Examples
Se fue la luz y tuvimos que cenar a oscuras.
The power went out and we had to eat dinner in the dark.
No puedes tomar una decisión tan importante a oscuras.
You can't make such an important decision blindly (without knowing the facts).
Fixed Adverbial Phrase
When used to mean 'in the dark' or 'blindly,' 'oscuras' almost always follows the preposition 'a'. The phrase 'a oscuras' functions as an adverb, describing how an action is performed.
Always Plural and Feminine
Even though this phrase acts like an adverb (which usually doesn't change), 'a oscuras' is fixed in the feminine plural form and never changes to 'a oscuro' or 'a oscuros'.
Literal vs. Figurative Use
Related Translations
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