wispy

薄い髪

describes hair that is fine, thin, and soft.

細くて薄く、柔らかい髪を指します。

refers to a thin, feathery-looking cloud.

describes a beard that is thin and not dense.

薄い前髪

refers to a thin, light fringe of hair on the forehead.

額にかかる、薄くて軽い前髪を指します。