niṣprayojana, vaiyarthya; anarthaka, apārtha, apārthaka, apārthika, ayatna, avyāpṛti, asāmarthya, niḥprayojana, niḥprayojanatva, niryatna, nirvyāpāra, niṣkriya, niṣpuruṣakāratva, niḥsāmarthya, prayojanābhāva, vṛthā.