| 单 |
dān jiàn | single bond (chemistry) |
| 单 |
Shàn | surname Shan |
| 单 |
chán | used in 单于 |
| 单 |
dān | bill / list / form / single / only / sole / odd number / CL:个 |
| 键 |
jiàn | key (on a piano or computer keyboard) / button (on a mouse or other device) / chemical bond / linchpin |