breast (English)

Where does "breast" come from?

The English word 'breast' originates from the Old English 'brēost'[1][2], which traces back through Proto-West Germanic 'breust'[1][3] and Proto-Germanic 'breustą'[1][4]. The ultimate root is the Proto-Indo-European '*bʰrews-', a term meaning 'to swell'[1][4]. This ancestry is shared by various Germanic languages, including German 'Brust', Dutch 'borst', and Swedish 'bröst'[1]. The word has maintained its core association with the human or animal chest and its anatomical functions throughout its historical development[1].

Open questions

The Proto-Indo-European reconstruction '*bʰrews-' is interpreted as having a specific meaning of 'to swell' that appears distinct from a separate root denoting 'break' or 'burst'. [4]

Full etymology tree

breast (English), 'Either of the two organs on the front of a female human's chest, which contain the mammary glands; also the analogous organs in males.'
- inherited brest (Middle English), 'chest, thorax'
  - inherited breost (Old English), 'chest'
    - inherited *breust (Proto-West Germanic), 'breast, chest'
      - inherited *breustą (Proto-Germanic), 'breast, chest'
        inherited *bʰrews- (Proto-Indo-European), 'to break'

Ancestors

brest (Middle English)
breost (Old English)
*breust (Proto-West Germanic)
*breustą (Proto-Germanic)
*bʰrews- (Proto-Indo-European)

Cognates and doublets

bryst (Danish)
borst (Dutch)
Brust (German)
bröst (Swedish)
boarst (West Frisian)

Descendants and derived words

abreast (English)
abreast (English)
abreast (English)
bare one's breast (English)
beat one's breast (English)
bluebreast (English)
Breastapo (English)
breast augmentation (English)
breastaurant (English)
breastband (English)
breastbeam (English)
breast-beating (English)

Sources

Updated August 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris