vt. 使苦恼,使烦恼
vi. 生病
n. 病痛,苦恼
ail 生病的
来自PIE*agh, 恐惧,害怕,字母g脱落。词源同awe, 敬畏,ugly, 丑陋。由恐惧衍生出敬畏,丑陋,忧患,病痛等。
It is remarkable, that this word is never used but with some indefinite term, or the word no thing; as What ails him? ... Thus we never say, a fever ails him. [Johnson]