うすら

• うすらUsage76%

  Usually written in kana; the kanji form 薄ら is rare.

• ウスラUsage18%
• 薄うすらUsage6%

  Kanji form is rarely used; kana spelling is standard.

Derived from the stem of the adjective 薄い (usui, 'thin, pale'), with the suffix ら, which can indicate a vague state or manner. The exact historical development is uncertain.