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ball (for sport, games, etc.)
kemari; type of football played by courtiers in ancient Japan
「毬」 has other readings with different meanings.
子どもたちが庭で色とりどりの毬で遊んでいた。
The children were playing with colorful balls in the garden.
正月には毬をついて遊ぶ伝統的な遊びがある。
There is a traditional game of bouncing a ball played at New Year.
絹の毬が博物館に美しい状態で保存されていた。
A silk ball was preserved in beautiful condition at the museum.