decenio

decade

noun deh-SEH-nyoh Rare

Origin: From Latin decenium ('period of ten years').

Usage Note

Decenio is a formal synonym for década, both meaning a ten-year period. Década is far more common in everyday and journalistic speech; decenio tends to appear in official UN, academic, or historical documents. Learners should recognise decenio in formal reading but default to década in production.

Examples

"El proyecto duró casi un decenio completo."

Natural Translation

The project lasted almost a full decade.

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