куб

Borrowed from Russian куб (kub), from German Kubus, from Latin cubus, from Ancient Greek κύβος (kúbos, “die, cube”).

куб • (kwb)

1. (geometry) cube

куб • (kub) m

1. cube

• IPA^(key): [kup]

Borrowed in the early 18th century from German Kubus or directly from Latin cubus, from Ancient Greek κύβος (kúbos, “die, cube”).

куб • (kub) m inan (genitive ку́ба, nominative plural ку́бы, genitive plural ку́бов)

1. (geometry) cube (shape with six square sides)
2. (mathematics) cube (number raised to the third power)

   два в ку́бе ― dva v kúbe ― 2³

• кубату́ра (kubatúra)
• ку́бик (kúbik)
• куби́ческий (kubíčeskij)

Inherited from Old East Slavic кубъ (kubŭ, “drinking vessel”) [14th century], further origin uncertain.

Cognate with Ukrainian куб (kub, “wooden dish”), Polish kubek (“bowl, cup”), Lower Sorbian kub (“bowl, cup”), also kubk.

Per Vasmer, likely related to Sanskrit कुम्भ (kumbha, “pot”), Avestan 𐬑𐬎𐬨𐬠𐬀‎‎ (xumba‎, “pot”), Ancient Greek κύμβος (kúmbos, “vessel”), κύβη (kúbē, “cup”), also κύμβη (kúmbē).

However Trubachev notes that there are no signs of a nasal vowel and reconstructs Proto-Slavic *kubъ, thus rejecting possible link to Proto-Indo-European *kumbʰo-, *kumbʰéh₂- (“vessel”) and proposing connection to *koubʰ-.

куб • (kub) m inan (genitive ку́ба, nominative plural кубы́ or ку́бы, genitive plural кубо́в or ку́бов)

1. boiler, still, large tank

   перего́нный куб ― peregónnyj kub ― distillation boiler

• кубово́й (kubovój)
• ку́бовый (kúbovyj, “related to vat dyeing”)
• ку́бок (kúbok)
• кубы́шка (kubýška, “potbellied vessel with a neck”)
• ку́бовина (kúbovina, “convexity”)

Clipping of ку́бовый краси́тель (kúbovyj krasítelʹ, “vat dye”), from ку́бовый (kúbovyj, “related to dye vatting”), from куб (kub, “large tank, vat”), see above.

куб • (kub) m inan (genitive ку́ба, nominative plural ку́бы, genitive plural ку́бов)

1. (obsolete) vat dye, specifically alkaline solution of indigo prepared for dyeing
2. indigo (plant)