LATIN DICTIONARYLexicon Latīnum
noun · neuterthird declension

iubar

iubar n (genitive iubaris)
Classical[ˈjʊ.bar]Ecclesiastical[ˈjuː.bar]

Meaning

  1. neuterradiance of celestial bodies, sunshine, light, rays of light, brightness; (less exactly) dawn, morning
    interea fugit albus iubar Hyperionis cursum;meanwhile the white radiance of Hyperion fled its course; thence the bright-shining wheel uncovered the sky with its rays239 BCE – 169 BCE, Ennius, Annales 571–572
    Ōceanum intereā surgēns Aurōra relīquit. It portīs iubare exortō dēlēcta iuventūs [...].Meanwhile Aurora, rising, departs from Oceanus. [Then,] with Dawn’s radiance having shone forth, chosen youth go out the [city] gates ….29 BCE – 19 BCE, Vergilius, Aeneis 4.129-130
  2. figurativelyneutera splendid appearance, glory, splendor

Latīnē defined in Latin in our graded readers

Declension

declension
formsingularplural
nominativeiubariubara
genitiveiubarisiubarum
dativeiubarīiubaribus
accusativeiubariubara
ablativeiubareiubaribus
vocativeiubariubara

jŭbar, ăris (m.: albus jubar, Enn. ap. Prisc. p. 658 P.; Auct. Aetna, 332), n. 1. juba,
I. the radiance of the heavenly bodies, light, splendor, brightness, sunshine.
I. Lit.: it portis jubare exorto delecta juventus, Verg. A. 4, 130; cf.: jubar stella, quam Graeci appellant φωσφόρον vel ἕσπερον, Paul. ex Fest. p. 104 Müll.: quintus ab aequoreis nitidum jubar extulit undis Lucifer. Ov. F. 2, 149: jubar aureus extulerat sol, id. M. 7, 663; cf. Val. Fl. 4, 93; cf. of Aurora, Ov. F. 4, 944: hanc animam interea, caeso de corpore raptam, Fac jubar, make into a constellation, id. M. 15, 840.—
II. Transf., a splendid appearance, splendor, glory, radiance: non ille vultus flammeum intendens jubar, Sed fessus ac dejectus, Sen. Troad. 448: purpureum fundens Caesar ab ore jubar, Mart. 8, 65, 4.

Origins

Uncertain: * From Proto-Italic *djuβās, from Proto-Indo-European *dyew-bʰeh₂-es- (“bringing the light of daytime”, literally “sky-shining”), from *dyew- (“sky, heaven”) (whence Latin diēs (“day”)) and *bʰeh₂- (“to shine”) (whence Ancient Greek φάος (pháos, “light”)). * From Proto-Indo-European *Hyéwdʰ-r̥ from the root *Hyewdʰ-, from which also iubeō, directly cognate to Ancient Greek εἶθαρ (eîthar, “at once”).

Quick answers

What does iubar mean in Latin?
iubar, a noun, means “radiance of celestial bodies, sunshine, light, rays of light, brightness; (less exactly) dawn, morning; a splendid appearance, glory, splendor”.
What is the genitive of iubar?
The genitive singular is iubaris. iubar is neuter, third declension.
How do you pronounce iubar?
In classical Latin, [ˈjʊ.bar]; in ecclesiastical (church) Latin, [ˈjuː.bar].