functio

Latin

Etymology

Action noun of the verb fungor (“I perform, execute”).
Derived from root fug- ("perform", "execute") (from Proto-Indo-European *bʰewg- (“to enjoy”)) with nasal infix (-n-) irregularly borrowed from present tense forms (fung-) + -tiō (“nominal derivational suffix”).

Pronunciation

(Classical Latin) IPA^(key): /ˈfuːnk.ti.oː/, [ˈfuːŋkt̪ioː]
(modern Italianate Ecclesiastical) IPA^(key): /ˈfunk.t͡si.o/, [ˈfuŋkt̪͡s̪io]

Noun

fūnctiō f (genitive fūnctiōnis); third declension

performance, execution (of a task)
(mathematics) function

Declension

Third-declension noun.

Case	Singular	Plural
Nominative	fūnctiō	fūnctiōnēs
Genitive	fūnctiōnis	fūnctiōnum
Dative	fūnctiōnī	fūnctiōnibus
Accusative	fūnctiōnem	fūnctiōnēs
Ablative	fūnctiōne	fūnctiōnibus
Vocative	fūnctiō	fūnctiōnēs

Descendants

Catalan: funció
→ Czech: funkce
→ Danish: funktion
→ Dutch: functie (see there for further descendants)
→ English: function
→ Esperanto: funkcio
→ Estonian: funktsioon
→ Finnish: funktio
French: fonction
→ German: Funktion
Italian: funzione
→ Latvian: funkcija
→ Lithuanian: funkcija
→ Norwegian: funksjon
Occitan: foncion
→ Polish: funkcja
Portuguese: função
Romanian: funcție, funcțiune
→ Russian: фу́нкция (fúnkcija)
→ Serbo-Croatian: fùnkcija (фу̀нкција)
Sicilian: funziuni
Spanish: función, funcción
→ Swedish: funktion

References

“functio”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
“functio”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
functio in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
functio in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.