Common Meanings
1
nǎi乃
When pronounced "nǎi", 乃 can mean "only then," "then," or "thereupon," indicating that an action or state occurs as a direct result or consequence of a preceding condition or action. It often implies a realization or completion after a process.
他苦读数载，乃考入理想大学。
After years of diligent study, he was then admitted to his dream university.
Used as a copula, meaning 'is' or 'to be'. It often carries a formal or literary tone, indicating something is truly or essentially what is stated.
读书乃人生一大乐事。
Reading is one of life's greatest pleasures.
To the extent of; even; actually (indicating an unexpected or surprising situation or outcome).
他学习很努力，乃至于周末也在图书馆。
He studies very hard, even spending his weekends in the library.
Therefore; thereupon; then (indicating a consequence or sequence of events)
因情况复杂，我们乃决定寻求专业帮助。
Because the situation was complex, we then decided to seek professional help.
Used formally or literarily, meaning 'your' or 'yours', indicating possession.
昔日与乃友相遇，他安好否？
I met your friend some time ago; is he doing well?