What does 薄まる mean?
薄まる is a Japanese verb meaning “to be diluted” in English. It is written as 薄まる in kanji, うすまる in hiragana, and usumaru in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
彼に会ったのを薄々覚えている。
I vaguely remember meeting him.