i Register
In some senses, umbra is marked as literary, archaic. Watch for register when choosing this word.
umbra
UK /ˈʌmbɹə/ US /ˈʌmbɹə/
noun 5
Definitions
noun
1
The fully shaded inner region of a shadow cast by an opaque object.
2
The fully shaded inner region of a shadow cast by an opaque object.
3
The central region of a sunspot.
4
A shadow.
5
An uninvited guest brought along by one who was invited.
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