Etymograph

English

morosity

Morosity comes from French morosité ‘gloom’, from Latin morositas ‘peevishness’, and ultimately from Proto-Italic *mōs.

  1. Proto-Italicc. 1500–700 BCE*mōs1reconstructedearlier origin unknown
  2. Latinc. 75 BCE–200 CEmos2‘way, custom, habit, self-will’
  3. Latinc. 75 BCE–200 CEmorosus2‘particular, scrupulous, fastidious, self-willed, wayward, capricious, fretful, peevish’
  4. Latinc. 75 BCE–200 CEmorositas2‘peevishness’
  5. Frenchc. 1600–presentmorosité2‘gloom’
  6. Englishtodaymorosity2

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin mos
  2. 2 Wiktionary, English morosity

Lineage

  1. Proto-Italicc. 1500–700 BCE*mōsWiktionary, Latin mosreconstructedearlier origin unknown
  2. Latinc. 75 BCE–200 CEmosWiktionary, English morosity‘way, custom, habit, self-will’
  3. Latinc. 75 BCE–200 CEmorosusWiktionary, English morosity‘particular, scrupulous, fastidious, self-willed, wayward, capricious, fretful, peevish’
  4. Latinc. 75 BCE–200 CEmorositasWiktionary, English morosity‘peevishness’
  5. Frenchc. 1600–presentmorositéWiktionary, English morosity‘gloom’
  6. EnglishtodaymorosityWiktionary, English morosity

Linked words

through Proto-Italic *mōs

morale, morality, demoralize, 3 more

through Latin mos ‘way, custom, habit, self-will’

moral, mores, 6 more

Today it means

noun The state or quality of being morose.

Sources

Sources: Wiktionary, “morosity”; the older steps come from the Wiktionary entry for Latin mos. 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-Italic *mōs / morosity

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