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-icus

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Etymology and origin of the Latin word -icus

-icus1 of, pertaining to

Confidence
Established
Formation
Inherited
First attested
c. 250–184 BC Plautus
Inherited from
Proto-Italic *-ikos
Ultimate origin
Proto-Indo-European *-ikos

Pronunciation

  • Classical: [ɪ.kʊs][1]
  • Ecclesiastical: [i.kus][1]

Forms

-icus (feminine -ica, neuter -icum); first/second-declension suffix[1]

Etymology

The suffix of adjectives of appurtenance is inherited from Proto-Italic *-ikos, from Proto-Indo-European *-ikos.[1][2][3] Fortson regards it as a longer form of the velar suffix *-ko-, and compares bellicus with Ancient Greek ἱππικός (hippikós, “having to do with horses”).[3] It is cognate with -ικός (-ikós), Proto-Germanic *-igaz (whence Old High German -ig and Old English -ig), Gothic -𐌴𐌹𐌲𐍃 (-eigs), Sanskrit -इक (-ika) and Proto-Slavic *-ьcь.[1] The OLD files words of this type under -cus.[4]

Earliest recorded meaning

Plautus, of about 250–184 BC,[5] already has bellicus (“of war”), cīvicus (“of a citizen”), hosticus (“of an enemy”), pūblicus (“public”), vīlicus (“farm overseer”) and Italicus.[2] Weiss notes that the adjectives pertained at first to the social and political sphere.[2]

Semantic evolution

It spread to adjectives of appurtenance from peoples and places, such as Āfricus and Gallicus, and to nouns such as canticum and classicum.[2] Weiss thinks -āticus may have arisen by misanalysis of derivatives made on bases in /-āto-/, and it is the source, through French, of English -age.[2] Meiser derives Mārcus from the name of Mars with this suffix, the /i/ syncopated.[6] English -ic comes from French -ique and directly from the Latin suffix or its Greek cognate.[7]

Timeline

Meanings

Suffix

  1. Forms adjectives meaning “of”, “belonging to” or “connected with”: bellicus, cīvicus, Gallicus, Italicus.[1][2]
  2. Forms some nouns from other nouns: canticum, classicum, vīlicus.[1][2]

Word family

-icus2 from verbs, with long vowel

Confidence
Uncertain
Formation
Inherited
First attested
c. 250–184 BC Plautus
From
Proto-Indo-European *-kos

Pronunciation

  • Classical: [iː.kʊs][1]
  • Ecclesiastical: [i.kus][1]

Forms

-īcus m (genitive -īcī, feminine -īca); second declension[1]

Etymology

The suffix with a long vowel is probably from Proto-Indo-European *-kos or *-ḱos in an extended form, and the /ī/ may come from an instrumental case form.[1] Weiss finds a source in the instrumental plausible for these words, with amīcus as “with love”, mendīcus as “with fault” and pudīcus as “with shame”,[2] though he also mentions a different analysis of the last as “chaste-looking”.[2] Compare -ūcus, -ītus and fēlīx.[1]

Earliest recorded meaning

Plautus, of about 250–184 BC,[5] already has amīcus (“friendly”), mendīcus (“beggarly”) and pudīcus (“chaste”).[2] The OLD records the spelling ⟨ameicus⟩ in his Poenulus.[4]

Semantic evolution

It makes words from nouns and verbs, and also feminine nouns such as lectīca and vēsīca.[4][1]

Timeline

Meanings

Suffix

  1. Forms adjectives from verbs or nouns: amīcus, pudīcus.[4][1]
  2. Forms nouns, including feminine ones: umbilīcus, lectīca, vēsīca.[4][1]

Word family

  • -ānus
  • -ēnsis
  • English -ic

References

  1. ^ a b c d e f g h i j k l m n o Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o Weiss, Michael (2020), Outline of the Historical and Comparative Grammar of Latin, 2nd ed., Ann Arbor: Beech Stave
  3. ^ a b Fortson, Benjamin W., IV (2010), Indo-European Language and Culture: An Introduction, 2nd ed., Malden, MA / Oxford: Wiley-Blackwell
  4. ^ a b c d e Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  5. ^ a b c d e f g Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  6. ^ Meiser, Gerhard (2010), Historische Laut- und Formenlehre der lateinischen Sprache, 3rd ed., Darmstadt: WBG
  7. ^ Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com

Borrowed into

Related etymologies

  • vitus · also from Proto-Indo-European
  • plerus · also from Proto-Indo-European
  • -ivus · also from Proto-Indo-European
  • -osus · also from Proto-Indo-European
  • -ius · also from Proto-Indo-European
  • -culum · also from Proto-Indo-European
  • -men · also from Proto-Indo-European
  • -or · also from Proto-Indo-European
Cite this entry

“-icus.” Etymologically, 6 Nov. 2026, etymologically.com/la/-icus. Accessed 6 Nov. 2026.

Last edited on . ·