unsensible

adjective3

1. •
   Not sensible; silly, foolish.

   • "Hear, hear," and Joanna passed out of the conversation, for who was going to waste time either taking up or taking down a silly, tedious, foreign, unsensible notion like ploughing grass?... — 1921
2. •
   That cannot be sensed; imperceptible.
3. •
   Out of one's senses; unconscious.