Etymograph

English

brachialis

Brachialis comes from Latin bracchialis ‘brachial’, from bracchium ‘arm’, and ultimately from Proto-Indo-European *mreǵʰ- ‘short’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*mreǵʰ-1‘short’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*mréǵʰus1‘short’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*brəkʰús1reconstructed
  4. Ancient Greekc. 800–300 BCEβρᾰχῠ́ς1brăkhŭ́s‘short, brief’
  5. Ancient Greekc. 800–300 BCEβρᾰχῑ́ων1brăkhī́ōn‘upper arm’
  6. Latinc. 75 BCE–200 CEbracchium2‘arm’
  7. Latinc. 75 BCE–200 CEbracchialis3‘brachial’
  8. Englishtodaybrachialis3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin bracchium
  2. 2 Wiktionary, Latin bracchialis
  3. 3 Wiktionary, English brachialis

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*mreǵʰ-Wiktionary, Latin bracchium‘short’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*mréǵʰusWiktionary, Latin bracchium‘short’reconstructed
  3. Proto-Hellenicc. 2200–1600 BCE*brəkʰúsWiktionary, Latin bracchiumreconstructed
  4. Ancient Greekc. 800–300 BCEβρᾰχῠ́ςWiktionary, Latin bracchiumbrăkhŭ́s‘short, brief’
  5. Ancient Greekc. 800–300 BCEβρᾰχῑ́ωνWiktionary, Latin bracchiumbrăkhī́ōn‘upper arm’
  6. Latinc. 75 BCE–200 CEbracchiumWiktionary, Latin bracchialis‘arm’
  7. Latinc. 75 BCE–200 CEbracchialisWiktionary, English brachialis‘brachial’
  8. EnglishtodaybrachialisWiktionary, English brachialis

Linked words

through Proto-Indo-European *mreǵʰ- ‘short’

briefly, embrace, 32 more

through Proto-Indo-European *mréǵʰus ‘short’

brief, merry, brevity, abbreviate, 31 more

through Ancient Greek βρᾰχῠ́ς ‘short, brief’

bracelet, brassard, 13 more

through Latin bracchium ‘arm’

brass, bra, brace, pretzel, 8 more

Today it means

noun A muscle in the upper arm that flexes the elbow joint, in conjunction with the biceps brachii.

Sources

Sources: Wiktionary, “brachialis”; the older steps come from the Wiktionary entries for Latin bracchium, Latin bracchialis. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *mreǵʰ- / brachialis

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