---450 究

穴九 [] 穴

Cueva 穴 + Nueve 九

究

ref: 穴 + 九(jiǔ);究其根源 Jiū qí gēnyuán To trace something to its source;1. 究竟 jiūjìng what actually happened;2. 講究 jiǎngjiū be particular about something;3. 研究 yánjiū study, research;4. 追究 zhuījiū look into, investigate