Etymology and origin of the Romanian word ac
- Confidence
- Established
- Formation
- Inherited
- First attested
- 1508 a Slavonic-language document More words from the 16th century
- Inherited from
- Latin acus
- Ultimate origin
- Latin acus
Derivations
Pronunciation
- /ak/[1]
Forms
ac n (plural ace)[1] In the Moldovan Cyrillic alphabet the word was written ак.[1]
Etymology
It is inherited from Latin acus (“needle”).[2][3][4][1][5][6] It survives in all four branches: Aromanian ac, Megleno-Romanian ac and Istro-Romanian åc.[2][3][7][8][9] Its cognates are Dalmatian yuak, Italian ago, Sardinian agu and Occitan ac.[2][6] The Latin noun was feminine and of the fourth declension; it passed into the second, and so became masculine in Italian and Romanian, while Dalmatian and Sardinian kept the feminine.[10] French and Spanish replaced it with derivatives, French aiguille and Spanish aguja.[10][11] DELR links the Latin word with ācer (“sharp”), aciēs (“edge”) and acidus,[3] and Wiktionary traces it to Proto-Indo-European *h₂eḱ- (“sharp”).[1]
The railway sense “switch, points” is modelled on the same French word and on German Nadel.[3][10]
Earliest recorded meaning
DELR's first record is from 1508, in the Slavonic-language documents of the Romanian principalities.[3] In Romanian texts the word appears in Coresi's prints: MDA2 dates it to 1564,[4] and in a text by Coresi of 1580 the camel cannot pass „preîn urechile acului” “through the eye of the needle”.[10][12]
Semantic evolution
From the sewing needle the word was applied to things of the same shape: the hand of a clock or instrument, a pin, the needle of a conifer and the sting of a bee or wasp.[2][3][13] The DA groups the sting and sharp stabbing pains with the needle.[10] The railway sense “switch, points” came in the 19th century, after French and German;[3] the pointsman was then called acar, recorded from 1901.[3][2]
The family includes a needle box, acăriță (1825) or acarniță (1839), and the old adjective acos “sharp, stinging” (1682).[3] Many idioms use the word: a scăpa ca prin urechile acului “to have a narrow escape” and a avea ac de cojocul cuiva “to know how to deal with someone”.[13][4]
Timeline
- 1508 – first record, in a Slavonic-language document.[3]
- 1564 – in a print by Coresi.[4]
- 1580 – urechile acului “the eye of the needle” in a text by Coresi.[10]
- c. 1650 – the augmentative acoi.[3]
- 1682 – acos “sharp, stinging” in Dosoftei.[3]
- 1691–1697 – the diminutive acușor in Teodor Corbea's dictionary.[3]
- 1825 – acăriță “needle box” in the Lexicon of Buda.[3]
- 1839 – acarniță “needle box” and aculeț.[3]
- 1901 – acar “pointsman”.[3]
Meanings
Noun
- A needle: a small, thin steel tool with a point at one end and an eye at the other, for sewing.[13]
- Any similar pointed piece: a pin, a knitting needle, the needle of a syringe or a gramophone.[13][4]
- The hand or pointer of a clock or measuring instrument.[13][2]
- The narrow pointed leaf of a conifer.[13][3]
- The sting or sharp organ of some animals and plants.[13][2]
- (railways) A railway switch, the movable rail of points.[3][10]
Word family
- acar
- acarniță
- acăriță
- aculeț
- acușor
Related words
Usage notes
The plural is ace.[13] Curbă în ac de păr “hairpin bend” is a recent phrase, after English hairpin.[14]
References
- ^ a b c d e Wiktionary, the free dictionary, https://en.wiktionary.org
- ^ a b c d e f g 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. ac
- ^ a b c d e f g h i j k l m n o p q r Academia Română, Institutul de Lingvistică „Iorgu Iordan – Al. Rosetti” (2011–), Dicționarul etimologic al limbii române (DELR), vol. I: A–B (2011), vol. II: C (2015–2018), București: Editura Academiei Române; continued online at delr.lingv.ro, p. s.v. ac
- ^ 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, 5
- ^ Pușcariu, Sextil (1905), Etymologisches Wörterbuch der rumänischen Sprache I: Lateinisches Element, Heidelberg: Carl Winter, p. 1
- ^ a b Meyer-Lübke, Wilhelm (1935), Romanisches etymologisches Wörterbuch, 3rd ed., Heidelberg: Winter, p. 130
- ^ Papahagi, Tache (1963), Dicționarul dialectului aromân, general și etimologic, București: Editura Academiei Republicii Populare Romîne, p. 51
- ^ Capidan, Theodor (1935), Meglenoromânii III: Dicționar meglenoromân, București: Academia Română, p. 7
- ^ Kovačec, August (1998), Istrorumunjsko-hrvatski rječnik (s gramatikom i tekstovima), Pula
- ^ a b c d e f g 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. ac
- ^ Nocentini, Alberto; Parenti, Alessandro (2010), l'Etimologico: vocabolario della lingua italiana, Firenze: Le Monnier, p. s.v. ago
- ^ Tiktin, Hariton (2000–2005), Rumänisch-deutsches Wörterbuch, 3rd ed., revised by Paul Miron and Elsa Lüder, 3 vols., Cluj-Napoca: Clusium, p. s.v. ac
- ^ 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. 4
- ^ Dimitrescu, Florica (1997), Dicționar de cuvinte recente, 2nd ed., București: Logos (with the 3rd ed., 2013, in CLRE), p. s.v. ac
Related etymologies
Cite this entry
“Ac.” Etymologically, 11 Nov. 2026, etymologically.com/ro/ac. Accessed 12 Nov. 2026.
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