седина

gray hair, graying hair

sʲ ɪ dʲ ɪ n a
сед gray-haired, white-haired + ин belonging to or associated with; a member or person + а Feminine singular
noun · singular feminine, nominative Rare #53,023
gray hair, graying hair Usually refers to gray hair as a sign of aging.
RU: У него уже есть седина.
EN: He already has some gray hair.

Седина её старит.

The gray hair makes her look older.

Не седина порождает мудрость.

It is not gray hair that breeds wisdom.

Смотрю, у тебя уже появилась седина, старый хитрец!

Looks like you’ve already started going gray, you old rascal!

— 8 с половиной (1963)

Седина Вас старит.

Gray hair makes you look older.