| 不 |
bù céng | hasn't yet; hasn't ever |
| 不 |
bù | no; not so / (bound form) not; un- |
| 曾 |
Zēng | surname Zeng |
| 曾 |
céng | once / already / ever (in the past) / former / previously / (past tense marker used before verb or clause) |
| 曾 |
zēng | great- (grandfather, grandchild etc) |