Translation of "Uncertain" in Chinese

The father is always uncertain.

父亲总是不确定。

The future is very uncertain.

未來很渺茫。

Tom is still uncertain about whether to go to college or not.

汤姆还不清楚要不要上大学。

- He was doubtful about which way to take.
- He was uncertain about which way to go.
- He wasn't sure which way to go.

他很困惑该走哪条路。