If you describe an action as senseless, you think it is wrong because it has no purpose and produces no benefit.
people whose lives have been destroyed by acts of senseless violence.
被无意义的暴力行为毁掉生活的人们。
If someone is senseless, they are unconscious.
They were knocked to the ground, beaten senseless, and robbed of their wallets.
他们被打倒在地,不省人事,还被抢走了钱包。