How to Say "deceit" in Spanish
The Spanish word for “deceit” is “falsa” — C1 level.
English → SpanishC1
nounC1formal
act of deception

Examples
Su vida estaba construida sobre una falsa.
Her life was built upon a falsehood.
Noun Use
When used as a noun, 'falsa' usually refers to the abstract concept of untruth, rather than a specific spoken lie (for which you would use 'mentira').
Related Translations
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