noun
cold wintry wind; winter wind that strips trees bare
Specifically refers to a strong, cold wind in late autumn to early winter that blows leaves off trees. Often used in poetry and seasonal descriptions.
木枯らしが吹き荒れる夜だった。
It was a night when a cold wintry wind was raging.
木枯らしが街の落ち葉を舞い上げた
The winter wind sent the fallen leaves dancing through the streets.