1 (used about horses) easily excited or frightened and therefore difficult to control ﹙马﹚易惊而难以驾驭的

2 (used about people) not very serious and with ideas and feelings that keep changing ﹙人﹚轻浮的，易变的，反复无常的

3 likely to change suddenly 说变就变的；变幻莫测的: skittish financial markets 变幻莫测的金融市场skittish investors/traders说变就变的投资者/交易人