訓 また,もも ・ 音 コ
Sino-Vietnamese: cổ
Flesh 月 gives the meaning and 殳 gives the sound: the thigh, where the legs fork from the body.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
股を広げて座らないでください。 (またをひろげてすわらないでください)
Please don't sit with your legs spread wide.