noun

decades

decades

The bridge was built decades ago.

The bridge was built decades ago.

He has decades of experience in this field.

He has decades of experience in this field.

((of sth.)) multiple ten-year periods of (sth.) He has decades of experience.

Synonyms: years, centuries

From the singular 'decade' + plural '-s'. 'Decade' comes from the Greek 'dekas', meaning 'a group of ten'.

Remember the prefix 'deca-' means ten, like in 'decathlon' (ten events). Decades means multiple periods of ten years.

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