source: Ayunan Rasa - Langit, Warna, Rindu - Wattpad

verb (blurs, blurring, blurred)

make or become unclear or less distinct:

〈物〉を見えにくくさせる; 〈視界〉をぼやけさせる

e.g. with object : tears blurred her vision

〈相違･定義など〉を曖昧にする

e.g. his novels blur the boundaries between criticism and fiction

見えにくくなる, 曖昧になる, ぼやける; にじむ, 汚れる

e.g. no object : as daylight waned, the pages blurred.

a thing that cannot be seen or heard clearly:

はっきり見えないもの［景色］

e.g. the pale blur of her face

e.g. the words were a blur.

an indistinct memory or impression of events, typically because they happened very fast:

おぼろげな記憶; はっきりしない音

e.g. the day before was a blur.

mid 16th century (in the sense ‘smear that partially obscures something’): perhaps related to blear.