blur

Make a smudge on; soil by smudging.

Make dim or indistinct.

“The fog blurs my vision”

Become glassy; lose clear vision.

Make unclear, indistinct, or blurred.

Become vague or indistinct.

“The distinction between the two theories blurred”

To make less distinct or clear.

“The haze blurs the hills”

A hazy or indistinct representation.

“it happened so fast it was just a blur”