ignoble [ɪgˈnəʊbl]

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adj.不光彩的，卑鄙的；可耻的

morally bad and making you feel ashamed

There's something cowardly and ignoble about such an attitude. 这种态度有点怯懦可鄙。
Some very great men have come from ignoble families. 有些伟人出身低微。