unprincipled
adj. 无原则的；不道德的，不正直的；不合人道的
例句
Unprincipled accommodation will do harm to him.
无原则的迁就对他有害。
《新英汉大辞典》
It is a market where people can be very unprincipled and unpleasant.
在这个市场人们可能很缺乏原则也很不友好。
《柯林斯英汉双解大词典》
He never gets involved in unprincipled disputes.
他从不介入无原则的争端。
