To Cloud

1. (intransitive) To become foggy or gloomy, or obscured from sight.
2. (transitive) To overspread or hide with a cloud or clouds.
3. (transitive) To make obscure.
4. (transitive) To make less acute or perceptive.
5. (transitive) To make gloomy or sullen.
6. (transitive) To blacken; to sully; to stain; to tarnish (reputation or character).
7. (transitive) To mark with, or darken in, veins or sports; to variegate with colors.
8. (intransitive) To become marked, darkened or variegated in this way.