cuff, hem, foot of mountain
裾 centers on the lower edge or border of something: the hem or cuff of clothing, and by extension the foot of a mountain where it meets the plain.
裾 combines 衤 (clothing) with 居, which likely contributes the sound and the idea of being situated at the lower edge. The extension to 'foot of a mountain' comes from the hem-like base of a slope.
The clothing radical 衤 beside 居 suggests the part of a garment that sits at the bottom: the hem or cuff. Picture the hem of a robe resting just above the ground, like the foot of a mountain resting on the plain.
For キョ, imagine a tailor named Kyo carefully sewing the hem of a kimono: Kyo -> キョ, and the hem is the finished edge.
hem; (trouser) cuff; shirttail; bottom (of a kimono); train (of a dress)
foot of a mountain; plain at the foot of a mountain
foot of a mountain; base of a mountain; foothills
cuff (of pants); hem (of skirt); train (of dress); foot (of mountain)
raising a hem; taking up a hem; hemming (up); shortening (of trousers, skirts, etc.)
sharing with others what has been given to you; sharing a portion of the profit with others
exemption (from a regulation, etc. usu. because of small scale)
trimming hair
ankle pick
lining at the bottom of a kimono
rear footsweep
kimono with design on the skirt
fringing reef
lining at the bottom of a kimono
supporting industries; component and parts-supply industries
underskirt (half-slip), worn under kimono