noun, noun which may take the genitive case particle 'no'
a touch of; a hint of; a tinge of; a wreath of
Used with abstract nouns like 不安, 寂しさ, 悲しみ, or with visible things like 煙, 雲. Often implies a small, fleeting amount.
彼の言葉に一抹の不安を覚えた。
I felt a touch of unease at his words.
山の頂に一抹の雲
A wisp of cloud hung over the mountain top.
noun
a smear of; one stroke of
Used for a small amount of paint, ink, or a single brushstroke. Less common than sense 1.
キャンバスに絵の具の一抹がついてしまった。
A smear of paint got on the canvas.