thirty

A1 Topic:Numbers & Quantity

US /ˈθɝti/ UK /ˈθɜːti/ See IPA manual

Freq #3561

Meanings

1

num
The number 30; three times ten.

My brother turns thirty next month.

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Word family

Forms thirties

Etymology

From Middle English thirty, metathetic alternant of Middle English thriti, þrittiȝ, from Old English þrītiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).

thirty Middle English thriti Middle English þrītiġ Old English *þrīz tigiwiz Proto-Germanic

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# thirty

**Type:** Word
**Level:** A1
**Part of speech:** num
**IPA (US):** /ˈθɝti/
**IPA (UK):** /ˈθɜːti/
**Frequency rank:** 3561

## Meanings
1. The number 30; three times ten.

## Examples
- My brother turns thirty next month.

## Roots and Affixes
- Root: thirty
- Root: thriti
- Root: þrītiġ
- Root: *þrīz tigiwiz

## Etymology
From Middle English thirty, metathetic alternant of Middle English thriti, þrittiȝ, from Old English þrītiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”).

## AI Etymology
Thirty is from Middle English thirty, metathetic alternant of Middle English thriti, þrittiȝ, from Old English þrītiġ (“thirty”), from Proto-Germanic *þrīz tigiwiz (“thirty”, literally “three tens”), equivalent to three + -ty. Cognate with Scots therty, tretty (“thirty”), West Frisian tritich (“thirty”), Dutch dertig (“thirty”), German dreißig (“thirty”). In present-day use, it means the number 30; three times ten.

## Topics
- Numbers & Quantity

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thirty

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