A smear, smudge or blot.

Something that appears hazy or indistinct.

To make indistinct or hazy, to obscure or dim.

To smear, stain or smudge.

(intransitive) To become indistinct.

To cause imperfection of vision in; to dim; to darken.

(graphical user interface, transitive) To transfer the input focus away from.

(copyright law) To use a sign, image, expression, etc. sufficiently close to a trademarked one that it causes confusion between them.

(Malaysia, Singapore, informal) In a state of doubt or confusion.