Etymologically

Etymology and origin of the Italian word sinestro

Confidence
Established
Formation
Inherited
First attested
1294 before 1294, Guittone d'Arezzo More words from the 13th century
Inherited from
Latin sinextrum
Ultimate origin
Latin sinister

Pronunciation

  • /siˈnɛs.tro/[1]

Forms

sinestro (feminine sinestra, masculine plural sinestri, feminine plural sinestre)[1]

Etymology

It is inherited from Late Latin sinextrum, sinister (“left”), with the vowel of dexter (“right”).[1][2][3] The same form gave Old French senestre and Spanish siniestro, and the dialects have Bolognese snéster and Friulian signéstri.[2][3][4] sinistro is the learned doublet, taken again from Latin.[5][1]

Migliorini counted this pair of doublets among the words in which the 14th century replaced the Tuscan sound shape by the Latin one, until the Latin form won.[5]

Nocentini derives Latin sinister from the base of senex (“old”) with a contrastive suffix, as the weaker, “old” hand set against dexter.[4] DEI connects it with sine (“without”), as “the one that differs from the right”.[3]

Earliest recorded meaning

DELI's first record of sinestro is in Guittone d'Arezzo, before 1294, in the sense “unfavourable, adverse”.[5] DEI puts the form in the 13th century.[3]

Semantic evolution

Petrarch uses sinestra for the left hand, and Pulci writes of Rinaldo kneeling sul lato sinestro, on his left side.[2] DEI gives Petrarch's senèstro as a 14th-century variant.[3] The noun senestro “misfortune” is in Francesco da Barberino in 1314.[5] The form is now obsolete in the standard language, but it lives on in some northern dialects.[2][1][6]

Timeline

  • Before 1294 – Guittone d'Arezzo uses sinestro “adverse”.[5]
  • 1314 – Francesco da Barberino uses the noun senestro “misfortune”.[5]

Meanings

Adjective

  1. (archaic, Northern Italy) left, on the left side; a variant of sinistro.[6][1][2]
  2. (archaic) unfavourable, ominous.[1][5]

References

  1. ^ a b c d e f g Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Duro, Aldo (ed.) (1986–1994), Vocabolario della lingua italiana, Roma: Istituto della Enciclopedia Italiana; online ed. treccani.it/vocabolario (2008 copy)
  3. ^ a b c d e Battisti, Carlo; Alessio, Giovanni (1950–1957), Dizionario etimologico italiano, 5 vols., Firenze: Barbèra (reprint 1975)
  4. ^ a b Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier
  5. ^ a b c d e f g Cortelazzo, Manlio; Zolli, Paolo (1999), Dizionario etimologico della lingua italiana, 2nd ed. by Manlio Cortelazzo and Michele A. Cortelazzo, Bologna: Zanichelli
  6. ^ a b De Mauro, Tullio (ed.) (2003), Grande dizionario italiano dell'uso, CD-ROM version 2.0, Torino: UTET

Related etymologies

Cite this entry

“Sinestro.” Etymologically, 14 Nov. 2026, etymologically.com/it/sinestro. Accessed 15 Nov. 2026.

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