- Confidence
- Probable
- Formation
- Inherited
- First attested
- Plautus
- Inherited from
- Proto-Italic *lasso-
- Ultimate origin
- Proto-Indo-European (*leh₁d-)
Pronunciation
Forms
lassus (feminine lassa, neuter lassum, comparative lassior, superlative lassissimus); first/second-declension adjective[1]
Etymology
It is inherited from Proto-Italic *lasso-, inherited from Proto-Indo-European *lh₁d-to- (“tired”), a verbal adjective of the root Proto-Indo-European *leh₁d-, a d-enlargement of Proto-Indo-European *leh₁- (“to let”).[2][1] Cognate with Ancient Greek ληδεῖν (lēdeîn, “to be tired”) (in Hesychius), Albanian lodhem (“to be tired”), Gothic 𐌻𐌰𐍄𐍃 (lats, “slow”) and Gothic 𐌻𐌴𐍄𐌰𐌽 (lētan, “to let”).[2][3] Lewis & Short thought it a by-form of laxus.[4]
Earliest recorded meaning
In Plautus a character says he is tired from the voyage.[3][2] Köbler dates Plautus c. 250–184 BC.[5]
Semantic evolution
It was tired, weary or exhausted, mostly in poetry and post-Augustan prose, and poets used it of soil worn out by crops.[3][4] It also meant weary in mind, as in Plautus, worn out by love, and rēs lassae were misfortunes.[3] Döderlein says that fessus and fatīgātus describe a man who longs for rest from weariness he feels, lassus one who needs rest from real weakness after work.[6]
In medieval Latin it kept the sense “weary, tired of”.[7] It survives as Italian lasso, French las and Spanish laso.[1] English lassitude comes from its derivative lassitūdō, while English late is a Germanic cognate.[8]
Timeline
- c. 250–184 BC – Plautus uses it.[3][5]
- 43 BC–18 AD – Ovid speaks of soil growing old, tired from constant crops.[3][5]
- early 15th century – English lassitude is recorded, from lassitūdō.[8]
Meanings
Adjective
- Tired, weary, exhausted.[3][4]
- Of soil or plants, worn out.[3]
- Weary in mind, sick at heart.[3]
- Rēs lassae, misfortune, distress.[3]
Word family
- lassitūdō
- lassō
- lassulus
- lassescō
Related words
- lēnis
- lētum
- English lassitude
- English late
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
- ^ a b c d e f g h i j Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
- ^ a b c Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
- ^ a b c Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
- ^ Döderlein, Ludwig (1874), Döderlein’s Hand-book of Latin Synonymes, tr. H. H. Arnold, Andover: W. F. Draper
- ^ Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press
- ^ a b Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
Related etymologies
- opus · also from Proto-Indo-European
- albus · also from Proto-Indo-European
- potis · also from Proto-Indo-European
- salvus · also from Proto-Indo-European
- socius · also from Proto-Indo-European
- signum · also from Proto-Indo-European
- frater · also from Proto-Indo-European
- foedus · also from Proto-Indo-European
Cite this entry
“Lassus.” Etymologically, 16 Oct. 2026, etymologically.com/la/lassus. Accessed 16 Oct. 2026.
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