blur

noun

An indistinct or unclear shape, image, or memory, difficult to see or recall.

"The photograph was a complete blur."

verb

To make or become unclear, indistinct, or difficult to see or distinguish.

"Tears blurred her vision."

Thesaurus

Synonyms: blear, glaze over, film over, obscure, obnubilate, confuse, dim, slur, fuzz, smutch, smear, smudge

Antonyms: focalise, focalize, focus, sharpen