Etymologically

Etymology and origin of the Italian word losco

Confidence
Established
Formation
Inherited
First attested
1315 before 1315, Bonvesin da la Riva More words from the 14th century
Inherited from
Latin luscus
Ultimate origin
Latin luscus
Etymology tree
inherited borrowed derived
Latin luscus
Italian losco
From the same root
Latin luscinia ← luscus

Pronunciation

Forms

losco (feminine losca, masculine plural loschi, feminine plural losche)[1]

Etymology

It is inherited from Latin luscus (“blind in one eye”), a popular word.[2][3][4][1] Its Latin derivatives and its Romance outcomes show that it also meant “short-sighted”, “squinting” and “seeing badly in the evening”.[2][3] Sabatini–Coletti calls this the popular form beside the learned lusco.[5]

The same word is French louche (“cross-eyed; shady”), Old French lois and losche, Occitan losc, Catalan llosc, Spanish lusco, Portuguese lusco and Sardinian luscu.[3][6][7][8] Meyer-Lübke found the sense “short-sighted” in central and northern Italy, Sardinia, southern France, Catalonia and Spain, and “squinting” in Italy, France, Catalonia and Portugal.[6]

The origin of the Latin word is unknown to DELI and uncertain to DEI.[2][7][9] De Vaan reconstructs Proto-Italic *luk-sko- and finds most attractive Fruyt's derivation from Proto-Indo-European *leuk- (“light”), with Celtic verbs and nouns for seeing and the eye.[10][1] The OLD instead suggests an original form with ⟨n⟩, compare nuscitiōsus beside luscitiōsus (“night-blind”), changed under the influence of lūx (“light”).[11][10]

Earliest recorded meaning

DELI's first record is in Bonvesin da la Riva, before 1315, in the sense of someone who looks askance out of resentment, anger or annoyance.[2] The Battaglia dictionary quotes Bonvesin listing ailments of the sinner.[12]

Semantic evolution

In the 14th century the word still meant a defect of sight: Boccaccio uses it for “short-sighted”, and the Ottimo commentary for “cross-eyed”.[13] A proverb in Boccaccio and Sacchetti says Chi ha a far con Tosco, non vuole esser losco (“whoever deals with a Tuscan must not be short-sighted”), the Tuscans being thought shrewd.[14]

Nocentini explains the modern sense through the squinting, sullen look: from “looking askance” came “equivocal, of doubtful honesty”, as happens with words for defects of sight.[3] The sources date this sense differently.[2][7] DELI records it in Petrarch in 1374, while DEI puts the figurative sense in the 19th century and calls it a calque on French.[2][15] Wiktionary notes that French louche went through the same shift.[1] Today the adjective is used mostly of people and dealings that arouse suspicion, and the sense of poor sight is uncommon.[4][16][5]

Timeline

  • Before 1315 – Bonvesin da la Riva uses losco of a sullen look.[2]
  • 1374 – Petrarch uses it figuratively, of doubtful morals.[2]
  • 19th century – DEI dates the figurative sense “shady” and the noun loschezza.[15]

Meanings

Adjective

  1. (uncommon) short-sighted, squinting: of someone who narrows the eyes to see better because of poor sight.[4][16][5][9][1]
  2. Of a look, sullen, grim, askance: Mi guardò con aria losca.[4][16][17]
  3. (figurative) shady, of doubtful honesty: Al bar si vedevano facce losche.[4][16][5][1]

Noun

  1. (singular only) Something shady or dishonest: c'è del losco, there is something fishy.[4][5][17]

Adverb

  1. Askance, grimly: guardare losco.[4][5][17]

Word family

  • loscamente
  • loschezza
  • lusco
  • French louche

Usage notes

The form lusco is archaic or literary.[16][18][19]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
  3. ^ a b c d Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
  4. ^ a b c d e f g De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET
  5. ^ a b c d e f Sabatini, Francesco; Coletti, Vittorio; Manfredini, Manuela (2026), Dizionario italiano Sabatini Coletti, digital ed., Milano: Sansoni / Rizzoli Larousse
  6. ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter
  7. ^ a b c Battisti, Carlo; Alessio, Giovanni (1950–1957), Dizionario etimologico italiano, 5 vols., Firenze: Barbèra (reprint 1975)
  8. ^ Körting, Gustav (1907), Lateinisch-romanisches Wörterbuch: etymologisches Wörterbuch der romanischen Hauptsprachen, 3rd ed., Paderborn: Schöningh
  9. ^ a b Duro, Aldo (ed.) (1986–1994), Vocabolario della lingua italiana, Roma: Istituto della Enciclopedia Italiana; online ed. treccani.it/vocabolario (2008 copy)
  10. ^ a b de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  11. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  12. ^ Battaglia, Salvatore; Bàrberi Squarotti, Giorgio (1961–2002), Grande dizionario della lingua italiana, 21 vols., Torino: UTET; digital ed. Accademia della Crusca, p. 9, 225
  13. ^ Prati, Angelico (1951), Vocabolario etimologico italiano, Milano: Garzanti, p. 602
  14. ^ Tommaseo, Niccolò; Bellini, Bernardo (1861–1879), Dizionario della lingua italiana, 4 vols., Torino: UTET
  15. ^ a b Battisti, Carlo; Alessio, Giovanni (1950–1957), Dizionario etimologico italiano, 5 vols., Firenze: Barbèra (reprint 1975), p. 2271
  16. ^ a b c d e Devoto, Giacomo; Oli, Gian Carlo; Serianni, Luca; Trifone, Maurizio (2026), Nuovo Devoto–Oli: il vocabolario dell'italiano contemporaneo, digital ed., Milano: Le Monnier
  17. ^ a b c Vocabolario della lingua italiana Treccani (2011), Roma: Istituto della Enciclopedia Italiana
  18. ^ Gabrielli, Aldo (2020), Grande dizionario italiano, digital ed., Milano: Hoepli
  19. ^ Zingarelli, Nicola (2009), Lo Zingarelli 2010: vocabolario della lingua italiana, Bologna: Zanichelli

Related etymologies

Cite this entry

“Losco.” Etymologically, 14 Nov. 2026, etymologically.com/it/losco. Accessed 15 Nov. 2026.

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