ぼやける
ぼやける · boyakeru · JLPT N1 · verb-ichidan
to become blurred
🌫️ ぼやける: 'boya' = blurry haze, 'keru' = to go/become, so it becomes blurry, like a fogged window
ぼや (boya) is an old word for a faint, hazy glow, and ~ける (-keru) marks a change of state, so ぼやける is the state of turning hazy or dim.