nu·ga·to·ry /ˈnugəˌtori, ˈnju, ˌtɔr-/
(a.)無價值的,無用的,無效的,瑣碎的
Nu·ga·to·ry a.
1. Trifling; vain; futile; insignificant.
2. Of no force; inoperative; ineffectual.
If all are pardoned, and pardoned as a mere act of clemency, the very substance of government is made nugatory. --I. Taylor.
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nugatory
adj : of no real value; "a nugatory law"