decadal

C2+ Topic:Time

US /ˈdɛkədəl/ UK /ˈdekədəl/ See IPA manual

adj

Meanings

1

adj
relating to or occurring over a period of ten years

Scientists tracked decadal shifts in ocean temperature.

Thesaurus

Synonyms

1 adj · relating to or occurring... decennialten-yearly

Word family

Related forms decade decad

Etymology

From decade plus the suffix -al. Decade is from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten').

dekás Ancient Greek déka Ancient Greek

View etymology graph ->

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Time Word Formation & Derivatives

# decadal

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** ˈdɛkədəl
**IPA (UK):** ˈdekədəl

## Meanings
1. relating to or occurring over a period of ten years

## Examples
- Scientists tracked decadal shifts in ocean temperature.

## Synonyms
- decennial
- ten-yearly

## Related Forms
- decade
- decad

## Roots and Affixes
- Root: dekás
- Root: déka

## Etymology
From decade plus the suffix -al. Decade is from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten').

## AI Etymology
Decadal is from decade plus the suffix -al. Decade is from Late Latin decas (stem decad-), from Ancient Greek dekás ('group of ten'), from déka ('ten'). The ancestry passes through Ancient Greek dekás and Ancient Greek déka. The suffix -al forms an adjective of relation, so the English form is shaped by recognizable word formation as well as by its inherited or borrowed base. In present use as an adjective, it means "relating to or occurring over a period of ten years", keeping the historical formation close to the word's ordinary semantic work. Related words include decade and decad.

## Topics
- Time
- Word Formation & Derivatives

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decadal

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