adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Describes something appearing or being perceived unclearly, often with a sense of haziness or lack of sharpness. Can be used adverbially with と or as a する-verb.
遠くの山が薄ぼんやりと見える。
The distant mountains are faintly visible.
記
My memory is dim and I can't recall it clearly.
noun
Colloquial and somewhat dated term for a person who is slow-witted or not sharp. Often used teasingly or in light insults.
あいつは薄ぼんやりだから、説明しても無駄だ。
That guy is a dimwit, so explaining is pointless.