cubus

Latin

Etymology

From Ancient Greek κύβος (kúbos).

Pronunciation

• (Classical Latin) IPA^(key): /ˈku.bus/, [ˈkʊbʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈku.bus/, [ˈkuːbus]

Noun

cubus m (genitive cubī); second declension

1. A mass, quantity
2. (geometry) A cube

Declension

Second-declension noun.

	singular	plural
nominative	cubus	cubī
genitive	cubī	cubōrum
dative	cubō	cubīs
accusative	cubum	cubōs
ablative	cubō	cubīs
vocative	cube	cubī

Descendants

• English: cube
• French: cube
  • → Romanian: cub
  • → Turkish: küp
• Galician: cubo
• German: Kubus
• Italian: cubo
• Portuguese: cubo
• Russian: куб m (kub)
• Sicilian: cubbu
• Spanish: cubo

References

• “cubus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “cubus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• cubus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• “cubus”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• “cubus”, in William Smith et al., editor (1890), A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
• “cube”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.

Old Irish

Etymology

com- (“mutual, equal”) +‎ fius (“knowledge”). Calque of Latin conscientia.

Pronunciation

• IPA^(key): [ˈkuβus]

Noun

cubus n

1. conscience

   Synonym: cocubus

   Antonym: écubus

Inflection

Neuter u-stem
	Singular	Dual	Plural
Nominative	cubusN	cubusL	cuibseL, cuibsea
Vocative	cubusN	cubusL	cubus
Accusative	cubusN	cubusL	cubus
Genitive	cuibseoH, cuibseaH	cuibseoN, cuibseaN	cuibseN
Dative	cubusL	cuibsib	cuibsib
Initial mutations of a following adjective: H = triggers aspiration L = triggers lenition N = triggers nasalization

Derived terms

• cuibsech (“conscientious, scrupulous, upright”)

Descendants

• Irish: cúis (“conscience”)

Mutation

Mutation of cubus

radical	lenition	nasalization
cubus	chubus	cubus pronounced with /ɡ(ʲ)-/

Note: Certain mutated forms of some words can never occur in Old Irish.
All possible mutated forms are displayed for convenience.

Further reading

• Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019), “1 cubus”, in eDIL: Electronic Dictionary of the Irish Language