noun:

• jar; pot; vase
• dice cup
• depression (i.e. the basin of a waterfall)
• target (when aiming an arrow) - archaism
• (figurative) bull's-eye - usually written using kana alone ➜ 思うつぼ
• key point (of a conversation, etc.) - usually written using kana alone
• acupuncture point; moxibustion point - usually written using kana alone
• nodes on a fingerboard (of a shamisen, etc.) - often ツボ - usually written using kana alone