nugatory
/ˈnjuːgətərɪ/adjective
1- of no value or importance不重要的, 无价值的：
a nugatory and pointless observation.
毫无价值和意义的言论。
1.1
- useless; futile无用的; 徒劳的：
the teacher shortages will render nugatory the hopes of implementing the new curriculum.
师资缺少将使实施新课程计划的希望落空。
词源
early 17th cent.: from Latin nugatorius, from nugari 'to trifle'， from nugae 'jests'.