(of horses 马 easily excited or frightened and therefore difficult to control 易惊而难以驾驭的 (of people 人 not very serious and with ideas and feelings that keep changing 轻浮的；易变的；反复无常的 - (especially North American English,
business 商业 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
Word Originlate Middle English: perhaps from the rare verb skit ‘move lightly and rapidly’.