1. 恐惧的;害怕的
    If you are fearful of something, you are afraid of it.

fearful在线翻译

    e.g. Bankers were fearful of a world banking crisis...
           银行家们害怕会发生一场全球银行业危机。
    e.g. I had often been very fearful, very angry, and very isolated.
           我以前经常感到非常恐惧，非常愤怒，非常孤独。

2. 可怕的;严重的
    You use fearful to emphasize how serious or bad a situation is.

    e.g. The region is in a fearful recession.
           该地区处于严重的经济衰退中。
    e.g. ...the fearful consequences which might flow from unilateral military moves.
           单方面军事行动可能造成的可怕后果

3. 非常坏的;极坏的
    Fearful is used to emphasize that something is very bad.

fearful

    e.g. You gave me a fearful shock!
           你让我大吃一惊。
    e.g. 'It sounds the most fearful hard work,' Sybil said later.
           “这听起来是极为令人生畏的艰苦工作。”西比尔后来说。