noun
grayish color; greyish colour
Describes a color that is partly white or gray, often used for hair or mixed tones.
彼の髪は半白になっていた。
His hair had become grizzled.
noun
grizzled hair
Specifically refers to hair that is mixed with white or gray, often due to aging.
半白の髪が彼の年齢を感じさせる。
His grizzled hair makes him look his age.
白髪 refers to white or gray hair in general, while 半白 emphasizes the mixed, half-white appearance.
Compound of 半 (half) and 白 (white), literally meaning 'half-white'. The exact historical derivation is uncertain.