亏负 kuīfù to let someone down Origin Definitions Defs Strokes Stroke Words Sentences Sents kuīfù to let someone down 亏 虧 kuī verb to treat unfairly to treat someone unfairly; to let someone down负 負 fù verb to betray to betray a trust, fail to live up to expectations, or go against an agreementkuīfù to be deficient 亏 虧 kuī to lack to be deficient; to be short of; to lack负 負 fù nounadjective to owe to owe money or be in debt