senseless : (adj.) acetana; aviññāṇaka; visaññī; sammūḷha.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

don med

[translation-san] {LCh,MV} anartha

[translation-san] {LCh} vṛthā

[translation-san] asat-artha

[translation-eng] {Hopkins} senseless; meaningless; non-meaning; non-existent object

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary