Etymologically

Etymology and origin of the Romanian word undă

Confidence
Established
Formation
Inherited
First attested
c. 1500–1520 Psaltirea Hurmuzaki More words from the 15th century
Inherited from
Latin unda
Ultimate origin
Latin unda
Etymology tree
inherited borrowed derived
Latin unda
French onde
Italian onda
Romanian undă
Spanish onda
From the same root
Italian ondeggiare ← unda
Latin undō ← unda
Latin undulātus ← unda

Pronunciation

Forms

undă f (plural unde)[1]

Etymology

It is inherited from Latin unda (“wave”).[2][3][4][5][1] Its Aromanian counterpart is undã.[6][7][2] Its Romance cognates include Dalmatian yonda, Italian onda, Occitan onda, Catalan ona, Spanish onda and Portuguese onda.[2][8] The senses of physics follow French onde.[5][9][10]

De Vaan derives the Latin noun from a collective Proto-Indo-European *udnom (“body of water”), built on the oblique stem of the word for water, *wódr̥ (“water”); its plural was reinterpreted as a singular “wave”.[11][1] Its cognates include Ancient Greek ὕδωρ (húdōr) and the English word water.[11][12]

Earliest recorded meaning

The first record is in the Psaltirea Hurmuzaki (early 16th century), with the plural undele “the waves”.[13][3] The Codicele Voronețean has „Cela ce se gândeaşte aseamănă-se undeei mariei, de vântu lepădată” “he who doubts is like a wave of the sea, driven by the wind” (James 1:6).[5]

Semantic evolution

From the wave the word extended to the water of the sea, of a river or a lake, and to its surface: a ieși în undă is to come to the surface, and figuratively to come to light.[3][4] The movement of boiling water gave a da în undă “to come to the boil” and “to bring to the boil”.[4][14][3] Regional speech uses the plural for fits of temper: a-i veni cuiva undele cele rele “to have one's bad moods come over one”.[3] Aromanian has similar senses, “caprices” and “nerves”.[6][7]

In the 19th century the word took the scientific sense of a wave in physics from French, and modern terms such as lungime de undă “wavelength”, unde scurte “short waves” and undă de șoc “shock wave” were formed with it.[5][9][15] Ciorănescu lists the derivatives unda “to undulate; to boil”, undeza “to boil”, undui “to ripple”, modelled on French ondoyer, and unduios “wavy”, after French onduleux.[2]

Timeline

  • c. 1500–1520 – undele “the waves” in the Psaltirea Hurmuzaki, the first record.[13][3]
  • c. 1563–1583 – undeei mariei “of the wave of the sea” in the Codicele Voronețean.[5]
  • 1648 – tăria undelor “the force of the waves” in the New Testament of 1648.[4]
  • 1825 – dau undă “I make waves” in the Lexicon of Buda.[16]
  • 1977 – unda de șoc “the shock wave” of an earthquake in the press.[17]

Meanings

Noun

  1. A wave of water: a mass of water that rises and falls in rhythm; by extension, the water of a river, lake or sea; a torrent; rain or snow falling in gusts.[15][3][1]
  2. A gentle current of air; by extension, the air.[15]
  3. A light vibration; a faint sound;[15][18] (figurative) a surge of feeling: o undă de tristețe.[15][18]
  4. (physics) A wave: the propagation of an oscillation through a medium: lungime de undă “wavelength”, undă seismică “seismic wave”, unde scurte “short waves”.[15][9]
  5. Undă verde: a green wave, traffic lights timed so that cars can pass several in a row.[15][9]

Word family

  • unda
  • undeza
  • undui
  • unduios
  • inunda
  • Aromanian undã

Usage notes

The plural is unde.[15][1] A da în undă “to bring to the boil” is a kitchen phrase: the beans are given a first boil.[14][4]

References

  1. ^ a b c d e f Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d 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. undă
  3. ^ a b c d e f g Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2010), Micul dicționar academic, 2nd ed., 4 vols., București: Univers Enciclopedic Gold, p. 2, 1371
  4. ^ a b c d e Tiktin, Hariton (2000–2005), Rumänisch-deutsches Wörterbuch, 3rd ed., revised by Paul Miron and Elsa Lüder, 3 vols., Cluj-Napoca: Clusium, p. s.v. undă
  5. ^ a b c d e Academia Română (1965–2010), Dicționarul limbii române (DLR), serie nouă, tom I–XIX, București: Editura Academiei Române, p. s.v. undă
  6. ^ a b Papahagi, Tache (1963), Dicționarul dialectului aromân, general și etimologic, București: Editura Academiei Republicii Populare Romîne, p. 1085
  7. ^ a b Pascu, Giorge (1925), Dictionnaire étymologique macédoroumain, 2 vols. (I: Les éléments latins et romans; II: Les éléments grecs, turcs, slaves, albanais, germaniques, magyars, néologismes, créations immédiates, obscurs), Iași: Cultura Națională, p. 1, 180
  8. ^ Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 9059
  9. ^ a b c d Marcu, Florin (2000), Marele dicționar de neologisme, București: Saeculum Vizual, p. s.v. undă
  10. ^ Wikționar (Romanian Wiktionary), ro.wiktionary.org
  11. ^ 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
  12. ^ Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  13. ^ a b Gînsac, Ana-Maria; Ungureanu, Mădălina; Moruz, Alexandru et al., roPsalt: Re-evaluating the Sixteenth Century Romanian Psalters (aligned corpus), Iași: Universitatea „Alexandru Ioan Cuza”, https://scriptadacoromanica.ro, p. Ps 41:10
  14. ^ a b Scriban, August (1939), Dicționaru limbii românești (etimologii, înțelesuri, exemple, citațiuni, arhaizme, neologizme, provincializme), Iași: Presa Bună, p. 1377
  15. ^ a b c d e f g h DEX (2009), Dicționarul explicativ al limbii române [Explanatory dictionary of the Romanian language], Bucharest: Editura Univers Enciclopedic, p. 1170
  16. ^ 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. 733
  17. ^ Dimitrescu, Florica (1997), Dicționar de cuvinte recente, 2nd ed., București: Logos (with the 3rd ed., 2013, in CLRE), p. s.v. undă
  18. ^ a b Macrea, Dimitrie; Petrovici, Emil (coord.) (1955–1957), Dicționarul limbii romîne literare contemporane, 4 vols., București: Editura Academiei Republicii Populare Romîne, p. 4, 578

Related etymologies

  • 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
  • sta · also from Latin
Cite this entry

“Undă.” Etymologically, 11 Nov. 2026, etymologically.com/ro/und%C4%83. Accessed 12 Nov. 2026.

Last edited on . ·