adverb taking the 'to' particle, adverb, noun or participle which takes 'suru'
Describes something done or perceived to a small degree: a light coating, a faint memory, a dim light, etc. Often used with verbs like 見える, 覚えている, 積もる.
山の頂上に雪がうっすらと積もっていた。
A thin layer of snow had accumulated on the mountain top.
I only faintly remember him.