unkept

Adjective

Meaning

(especially of promises or contracts) having been violated or disregarded

Source: WordNet

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successful happy unbroken kept minted rolling in dough

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At the worst, a house unkept cannot be so distressing as a life unlived. Rose Macaulay

An unkept promise leads to a bad life. Yiddish Proverb

broken (or unkept) promises Source: Internet

broken contracts Source: Internet