secreto
secret
noun adjective seh-KREH-toh Less Common
Origin: From Latin secretus (set apart, hidden).
Usage Note
Secreto functions as both noun and adjective: guardar un secreto (to keep a secret), una reunión secreta (a secret meeting). The phrase en secreto means 'in secret' or 'secretly'. Secreto a voces is a Spanish idiom for an 'open secret' — something everyone knows but no one officially states. The feminine adjective form is secreta.
Examples
"Prometió guardar el secreto."
Natural Translation
He promised to keep the secret.
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