unprincipledadj.
英 ʌn'prɪnsɪp(ə)ld | 美 ʌn'prɪnsəpld
中文adj. 无原则的；不道德的，不正直的；不合人道的
词根词源
unprincipled (adj.)1630s, "not instructed" (in something), from un- (1) "not" + principled (adj.). Meaning "not honorable" is recorded from 1640s.
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