Etymologically

Etymology and origin of the Italian word curioso

Confidence
Established
Formation
Borrowing
First attested
1288, Sienese translation of Giles of Rome
Borrowed from
Latin curiosus
Ultimate origin
Latin cūra
Etymology tree
inherited borrowed derived
Latin curiosus
French curieux
Italian curioso
From the same root
Latin curiose ← curiosus

Pronunciation

  • /kuˈrjo.zo/, /kuˈrjo.so/[1]

Forms

curioso (feminine curiosa, masculine plural curiosi, feminine plural curiose)[1]

Etymology

It is a learned word, borrowed from Latin cūriōsus (“careful; inquisitive”), from cūra (“care, concern”).[2][3][4][1] The Latin adjective first meant “one who takes care of something”, and, from there “eager to know”; the sense “strange” is documented in Latin from the 9th century and lives on in southern dialects.[2][5] The same borrowing is French curieux and Spanish curioso.[3][5]

The Oxford Latin Dictionary analyses the Latin word as cūra with the suffix -ōsus, while Wiktionary takes it as a back-formation from incūriōsus (“careless”), and Devoto from an intermediate ⟨*curius⟩.[6][1][7] De Vaan traces cūra to Proto-Italic ⟨*kwois-ā-⟩ “care, watch” and the Proto-Indo-European root *kʷeys- (“to heed”).[8]

Earliest recorded meaning

The TLIO's first record is the Sienese translation of Giles of Rome, of 1288, and Bono Giamboni uses the word before 1292; in these early texts curioso means “careful, attentive”.[9][2] The sense “eager to know” is in Petrarch, before 1374.[2][10]

Semantic evolution

Old Italian used the adjective for something done with care, for a person refined in dress and food, for one greedy for something, and for one full of worries, as well as for one eager to see and learn.[9] The desire to know easily turned into prying: a life of Saint Anthony calls a man vano uomo, e curiosissimo delle mondane novitadi “a vain man, and most curious about worldly news”.[11]

The sense “odd, unusual, arousing curiosity” is recorded about 1535, in Annibal Caro.[2] The noun curiosità goes back to Bono Giamboni before 1292, and took the sense “rare object” in Galileo; the verb curiosare, to poke about, appears in Ippolito Nievo before 1861.[2] English borrowed the noun curioso in 1658–1672 for a person curious about science and art, and later a connoisseur.[10]

Timeline

  • 1288 – The Sienese translation of Giles of Rome uses curioso.[9]
  • Before 1292 – Bono Giamboni uses it for “careful” and has curiosità.[2]
  • Before 1374 – Petrarch uses curioso for “eager to know”.[2]
  • About 1535 – Annibal Caro uses it for “strange”.[2]
  • Before 1642 – Galileo uses curiosità for a rare object.[2]
  • 1658–1672 – English borrows curioso.[10]
  • Before 1861 – Ippolito Nievo has the verb curiosare.[2]

Meanings

Adjective

  1. curious, eager to know and learn: Era un ragazzo curioso di ogni cosa.[4][12][13][1]
  2. nosy, inquisitive about other people's affairs: Non essere così curioso![4][13][14]
  3. Odd, strange, unusual; also as an exclamation: È curioso che nessuno l'abbia notato.[4][12][13][14]
  4. Interesting, witty: una storia curiosa.[4]
  5. (literary) Careful, diligent.[4][12][14]

Noun

  1. An onlooker, a busybody: Davanti al negozio si era radunato un gruppo di curiosi.[4][12][14][1]
  2. il curioso: the odd thing: Il curioso è che lei non se ne sia accorta.[4][12][13]

Word family

  • curiosità
  • curiosare
  • curiosaggine
  • curiosamente
  • curiosone
  • incuriosire

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
  3. ^ a b Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
  4. ^ a b c d e f g h De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET
  5. ^ a b Battisti, Carlo; Alessio, Giovanni (1950–1957), Dizionario etimologico italiano, 5 vols., Firenze: Barbèra (reprint 1975), p. 1195
  6. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  7. ^ Devoto, Giacomo (1968), Avviamento alla etimologia italiana: dizionario etimologico, 2nd ed., Firenze: Le Monnier
  8. ^ de Vaan, Michiel (2008), Etymological Dictionary of Latin and the other Italic Languages, Leiden Indo-European Etymological Dictionary Series 7, Leiden; Boston: Brill
  9. ^ a b c Tesoro della Lingua Italiana delle Origini (1997–), Opera del Vocabolario Italiano, CNR, Firenze; tlio.ovi.cnr.it
  10. ^ a b c Stammerjohann, Harro, et al. (2008), Dizionario di italianismi in francese, inglese, tedesco, Firenze: Accademia della Crusca; online at difit.italianisticaonline.it
  11. ^ Battaglia, Salvatore; Bàrberi Squarotti, Giorgio (1961–2002), Grande dizionario della lingua italiana, 21 vols., Torino: UTET; digital ed. Accademia della Crusca
  12. ^ 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
  13. ^ a b c d Sabatini, Francesco; Coletti, Vittorio; Manfredini, Manuela (2026), Dizionario italiano Sabatini Coletti, digital ed., Milano: Sansoni / Rizzoli Larousse
  14. ^ a b c d Zingarelli, Nicola (2009), Lo Zingarelli 2010: vocabolario della lingua italiana, Bologna: Zanichelli

Related etymologies

  • no · also from Latin
  • cosa · also from Latin
  • a · also from Latin
  • mio · also from Latin
  • uno · also from Latin
  • si · also from Latin
  • sapere · also from Latin
  • fare · also from Latin
Cite this entry

“Curioso.” Etymologically, 22 Oct. 2026, etymologically.com/it/curioso. Accessed 23 Oct. 2026.

Last edited on . ·