unclear

adj.不清楚的

模糊的；不清楚的；未明确的；

形容词；

1、The instructions were very unclear, so I didn't know what to do.
指示非常不清楚，所以我不知道该怎么做。
2、His explanation was unclear, and I couldn't understand his point.
他的解释很含糊，我无法理解他的观点。