Etymologically

Etymology and origin of the Romanian word fiastru

Confidence
Established
Formation
Inherited
First attested
1471 record in the Slavonic charters More words from the 15th century
Inherited from
Latin filiaster
Ultimate origin
Latin fīlius
Etymology tree
inherited borrowed derived
Latin fīlius
French fils
Italian figlio
Romanian fiu
Spanish hijo
Latin fīliaster
Romanian fiastru
From the same root
Latin fīlia ← fīlius
Latin fīliālis ← fīlius
Latin fīliolus ← fīlius
Italian figliolo ← figlio

Forms

fiastru m (plural fiaștri, feminine equivalent fiastră)[1] Old texts often have hiastru: „Având un hiastru al său, pre nume Lupașco” “having a stepson of his, named Lupașco” (Neculce).[2][3] A plural fiestri occurs in a document of 1676: „nu sânt din fiestri” “they are not of the stepsons”.[3]

Etymology

It is inherited from Late Latin fīliaster (“stepson”), formed in Latin from fīlius (“son”) with the suffix -aster.[4][2][5][1] Ciorănescu cites Pușcariu, Candrea–Densusianu, the REW, Philippide and the DAR for this etymology.[4] The feminine fiastră “stepdaughter” may also continue fīliastra directly.[4][6] Iordan held that the word was a legal term rather than a popular one, a view Ciorănescu finds uncertain.[4]

It survives south of the Danube: Aromanian hiljeastru.[7][4] Its Romance cognates include Italian figliastro, Sardinian fizastru, French fillâtre, Occitan filhastre, Catalan fillastre, Spanish hijastro and Portuguese filhastro.[6][8][4]

Earliest recorded meaning

Tiktin's first record is of 1471, from the Romanian words in the Slavonic charters.[2] The feminine fiastră follows in 1621.[2] MDA2 cites Neculce's chronicle, which has the form hiastru.[5][2]

Semantic evolution

The word has kept its single sense “stepson”, with the feminine for “stepdaughter”, but it went out of common use and survives as an archaism.[5][9][10] Old documents also use it as an adjective, feciorii fiastri “the stepsons”.[3] In Bihor the forms fiostru and hiostru show a change of suffix.[3] Nineteenth-century poets used it figuratively: Bolintineanu for an unnatural son, Eminescu for the stars as the “sweet stepchildren of the sky”.[11][12]

Timeline

  • 1471 – the first record, in the Slavonic charters.[2]
  • 1621 – the feminine fiastră.[2]
  • 1676 – the plural fiestri in a document.[3]
  • 1685 – feciorii fiastri “the stepsons”, used as an adjective.[3]
  • 1810 – hiastru in a document printed in the Uricariul.[3]
  • 1825 – fiastru or fiiastru in the Lexicon de la Buda.[13]

Meanings

Noun

  1. (archaic) stepson; feminine fiastră: stepdaughter.[5][12][1]

Word family

  • fiastră

Usage notes

The plural is fiaștri; older plurals are fiastri and fieștri.[3][5] The word is pronounced in three syllables, fi-as-tru.[9]

References

  1. ^ a b c Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g Tiktin, Hariton (2000–2005), Rumänisch-deutsches Wörterbuch, 3rd ed., revised by Paul Miron and Elsa Lüder, 3 vols., Cluj-Napoca: Clusium, p. s.v. fiastru
  3. ^ a b c d e f g h Academia Română (1913–1949), Dicționarul limbii române (DA), ed. Sextil Pușcariu, tom I (A–B, C, D–De) and tom II (F–I, J–Lojniță), București: Socec / Universul / Monitorul Oficial și Imprimeriile Statului; page scans at cflr-scans.solirom.ro, p. s.v. fiastru
  4. ^ a b c d e f Ciorănescu, Alexandru (1958–1966), Diccionario etimológico rumano, La Laguna: Universidad de La Laguna (Romanian ed.: Dicționarul etimologic al limbii române, București: Saeculum, 2001), p. s.v. fiastru
  5. ^ a b c d e Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2010), Micul dicționar academic, 2nd ed., 4 vols., București: Univers Enciclopedic Gold, p. 1, 899
  6. ^ a b Candrea, I.-A.; Densusianu, Ov. (1907–1914), Dicționarul etimologic al limbii române: elementele latine (A–Putea), București, p. s.v. fiastru
  7. ^ Papahagi, Tache (1963), Dicționarul dialectului aromân, general și etimologic, București: Editura Academiei Republicii Populare Romîne, p. 556
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 3295
  9. ^ a b Academia Republicii Populare Romîne (1958), Dicționarul limbii romîne moderne, București: Editura Academiei Republicii Populare Romîne
  10. ^ Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2002), Noul dicționar explicativ al limbii române, București: Litera Internațional, p. s.v. fiastru
  11. ^ Damé, Frédéric (1893–1895), Nouveau dictionnaire roumain-français, 4 vols., Bucarest: Imprimerie de l'État, p. s.v. fiastru
  12. ^ a b Macrea, Dimitrie; Petrovici, Emil (coord.) (1955–1957), Dicționarul limbii romîne literare contemporane, 4 vols., București: Editura Academiei Republicii Populare Romîne, p. 2, 283
  13. ^ Lesicon românescu-latinescu-ungurescu-nemțescu quare de mai mulți autori, în cursul a trideci și mai multor ani s-au lucrat (1825), Buda: Typographia Universității (the Lexicon of Buda, ed. Petru Maior et al.), p. 217

Related etymologies

  • apă · also from Latin
  • bun · also from Latin
  • unde · also from Latin
  • veni · also from Latin
  • noi · also from Latin
  • bine · also from Latin
  • un · also from Latin
  • și · also from Latin
Cite this entry

“Fiastru.” Etymologically, 11 Nov. 2026, etymologically.com/ro/fiastru. Accessed 12 Nov. 2026.

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