taru-adjective, adverb taking the 'to' particle
aimless; rambling; desultory; casual
Describes doing something without a clear purpose, plan, or focus, often with a sense of drifting or being haphazard. Used as a たる adjective or adverbially with と.
He was wandering aimlessly through the streets.
It's a waste to spend your days in a desultory manner.
If you just listen to the class aimlessly, you won't really absorb the material.
Without any goal, I was just drifting through my days aimlessly.
His superior finally spoke up about his listless, unfocused attitude.