noun. The character or condition of being senseless, in any sense.

noun. The state of being senseless.

noun. total lack of meaning or ideas

"And not only had they found nothing, but they had plainly acknowledged that the very thing which made me despair -- namely the senselessness of life -- is the one indubitable thing man can know."

meaninglessness  

abusiveness  amateurishness  atomism  boorishness  callousness  

insensibility  unwisdom