unnatural
/ʌnˈnætʃrəl; ʌn`nætʃrəl/ adj
1 not natural or normal; differing from what is the usual or expected 不自然的; 不正常的; 反常的; 出乎意料的
His face turned an unnatural shade of purple. 他气得脸色发紫, 十分难看.
It was unnatural for the room to be so tidy. 房间竟然这样整洁, 真出乎所料.
2 (derog 贬)
(a) contrary to usual and generally accepted behaviour 行为反常而不合情理的
unnatural sexual desires 变态的性欲.
(b) extremely cruel or wicked 极残酷的; 极邪恶的
the unnatural murder of his own father （他）丧尽天良的弑父.
3 not sincere; affected or forced 虚假的; 做作的; 勉强的
an unnatural high-pitched laugh 装出的尖声大笑.