1. emptiness
2. void
3. abstract theory or guiding principles
4. empty or unoccupied
5. diffident or timid
6. false
7. humble or modest
8. (of health) weak
9. virtual
10. in vain

1. letter
2. symbol
3. character
4. word
5. courtesy or style name traditionally given to males aged 20 in dynastic China

classifier: 個