blur

Short definition from Wiktionary

Verb

1. 1
   To make indistinct or hazy, to obscure or dim.
2. 2
   To smear, stain or smudge.
3. 3
   To become indistinct.
4. 4
   To cause imperfection of vision in; to dim; to darken.
5. 5
   To sully; to stain; to blemish, as reputation.
6. 6
   To transfer the input focus away from.
7. 7
   To use a sign, image, expression, etc. sufficiently close to a trademarked one that it causes confusion between them.

Noun

1. 1
   A smear, smudge or blot.
2. 2
   Something that appears hazy or indistinct.
3. 3
   Haziness, blurriness.
4. 4
   A moral stain or blot.

Adjective

1. 1
   Lacking awareness; clueless or confused.