unprincipled

adjective
🔊/ʌnˈprɪnsəpld/
🔊/ʌnˈprɪnsəpld/
(formal)
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  1. without moral principles不道德的 synonym dishonest
    • She saw him as an unprincipled opportunist.她认为他是一个不道德的投机分子。
    opposite principled