clouding

To become foggy or gloomy, or obscured from sight.

“The glass clouds when you breathe on it.”

To overspread or hide with a cloud or clouds.

“The sky is clouded.”

To make obscure.

“All this talk about human rights is clouding the real issue.”

To make less acute or perceptive.

“The tears began to well up and cloud my vision.”

To make gloomy or sullen.

To blacken; to sully; to stain; to tarnish (reputation or character).

To mark with, or darken in, veins or sports; to variegate with colors.

“to cloud yarn”

To become marked, darkened or variegated in this way.

A cloudy appearance.

A mottled appearance given to ribbons and silks in the process of dyeing.

A diversity of colours in yarn, recurring at regular intervals.