◎心虚xīnxū
(1) [afraid of being found out; with a guilty conscience]∶做错了事或坏事怕人知道
(2) [lacking in self-confidence; diffident]∶缺乏自信
胆壮是汉语词汇，拼音是dǎn zhuàng，解释为胆子大，有勇气。