Related topics: Human
na·vel /ˈneɪvəl/ noun [countableC] → naval1. HBHthe small hollow or raised place in the middle of your stomach 肚脐,脐 SYN belly button, tummy button
2. gaze at/contemplate your navel THINK ABOUTto spend too much time thinking about your own problems – used humorously 花过多时间考虑自己的问题〔幽默用法〕