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not yet payable;
"an undue loan"
-
not appropriate or proper (or even legal) in the circumstances;
"undue influence"
"I didn't want to show undue excitement"
"accused of using undue force"
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lacking justification or authorization;
"desire for undue private profit"
"unwarranted limitations of personal freedom"
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beyond normal limits;
"excessive charges"
"a book of inordinate length"
"his dress stops just short of undue elegance"
"unreasonable demands"