umbra means the fully shaded inner region of a shadow cast by an opaque object. It carries an Arena rating of 1673, earned across 3 head-to-head judged battles.
Among words judged in Lexicurio's Arena, umbra ranks #31 of 17,126 for Most Elegant Words, #662 of 17,149 for Most Exacting Words, #745 of 17,124 for Most Sublime Words, #1,494 of 17,127 for Most Vivid Words.
umbra is pronounced /ˈʌmbɹə/.
Why “umbra” is a great word
The fully shaded inner region of a shadow cast by an opaque object, especially the central dark area of a sunspot or the area experiencing totality in an eclipse. Borrowed from Latin umbra ("shadow, shade"). Unlike "shadow"—the broad, general shape cast by interruption—or "penumbra"—the nebulous, grayish fringe of partial light—the umbra is the absolute and geometrical core of darkness. It is the moon's black disk sliding over the sun and silencing birds mid-song, the crisp silhouette of a lone tree at noon, and the profound, unyielding void at the center of any well of grief—the place where all light, and with it all ambiguity, is definitively extinguished.
Etymology
Borrowed from Latin umbra (“shadow”). Doublet of umber.
noun
- The fully shaded inner region of a shadow cast by an opaque object.
- The fully shaded inner region of a shadow cast by an opaque object.; The area on the earth or moon experiencing the total phase of an eclipse.
- The central region of a sunspot.
- A shadow.
- An uninvited guest brought along by one who was invited.
- One of the family Umbridae of mudminnows.
- One of genus Umbrina of drums (family Sciaenidae).
- An element of the umbral calculus.e.g.“In order to set up such an algorithm, we need the notion of multiplicative inverse of an umbra. Two umbrae are said to be multiplicative inverse to each other when αγ ≡ u.” — 2009, Ernesto Damiani, Ottavio D'Antona, Vincenzo Marra, From Combinatorics to Philosophy: The Legacy of G.-C. Rota, (page 113)#:
Definitions & examples from Wiktionary (CC BY-SA 3.0).
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