obnubilation

The story

1. Late Latin · borrowed fromobnūbilātiō
2. English todayobnubilation

Borrowed from Late Latin obnūbilātiō. Compare brain fog as a similar metaphor. By surface analysis, obnubilate + -ion.

First known use, by meaning

• 1610 The action of darkening or fact of being darkened, as with a cloud; obscuration.
• 1753 Obscuration or clouding of the mind or faculties.
• 1814 A veiling with or concealment in clouds.
• 1999 Something that obscures or causes confoundment; an obfuscation.