the hem of a garment — the lower edge of clothing such as a shirt, skirt, kimono, or dress train.
シャツの裾がズボンから出ているよ。
Your shirt tail is sticking out of your pants.
ドレスの裾を踏まないように気をつけて歩いた。
She walked carefully so as not to step on the dress's train.
コートの裾に泥が付いていた。
There was mud on the hem of the coat.
the lower part or edge of an object — the bottom edge of cloth, a flag, etc.
旗の裾が風にはためいている。
The lower edge of the flag is fluttering in the wind.
the foot or base of a mountain; the lower slopes or base area.
山の裾に小さな村が点在している。
Small villages are scattered at the foot of the mountain.
the tips or ends (e.g., of hair) — the lower or terminal portions of something slender.
髪の裾を軽く巻くと印象が柔らかくなる。
Lightly curling the ends of your hair gives a softer impression.
archaic: downstream of a river; an old-fashioned usage rarely used in modern Japanese.
古い文献には川の裾と書かれていることがある（この用法は古語）。
Some old texts refer to the river's 'suso' (this usage is archaic).