likely to change frequently often without apparent or cogent reason; variable- Shakespeare
inconstant详细解释
in.con.stant adj.（形容词）Changing or varying, especially often and without discernible pattern or reason.善变的：易变的或反复无常的，尤指常无一定格式或道理的Fickle; faithless.善变的；不忠诚的 【引伸】 incon.stantly adv.（副词）
