Adjective

(en adjective)

Not sensible; silly, foolish.

*{{quote-book, year=1921, author=Sheila Kaye-Smith, title=Joanna Godden, chapter=, edition= citation

, passage="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?... }}

That cannot be sensed; imperceptible.

*{{quote-book, year=1921, author=William Beebe, title=Edge of the Jungle, chapter=, edition= citation

, passage=There is no breeze, no slightest shift of air-particles; yet down the gorge comes this cloud,--a cloud unsensible except to nostrils,--eddying as if swirling around the edges of leaves, riding on the air as gently as the low, distant crooning of great, sleepy jungle doves. }}

Out of one's senses; unconscious.

Adjective

(en adjective)

Bereft of feeling or consciousness; deprived of sensation; unconscious; insensible.

The blow to his head rendered him senseless , he didn't awaken until he was in the ambulance.

Lacking meaning or purpose; without common sense; pointless; meaningless.

What a senseless waste of money.

Without consideration, awareness or sound judgement; unreasonable; unwise; stupid.

He took senseless risks, not even aware of the danger he was in.