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Phrase(s): Hope deferred makes the heart sick. [and] Hope deferred maketh the heart sick.
Prov. If you have to wait a long time for something you want, you will become despairing. (Biblical.) • Charlie waited so long for the woman he loved that he decided he didn’t want to love anybody. Hope deferred makes the heart sick.
McGrawhill's American Idioms And Phrasal Verbs