haphazardly
Definitions
In a manner lacking any obvious principle of organization.
Without care, planning, or pattern; randomly.
Examples
The books were stacked haphazardly on the shelf, making it difficult to find the one I needed.
He threw his clothes haphazardly into the suitcase, hoping to catch the last train of the night.
Synonyms
randomly aimlessly carelessly disorderly erratically higgledy-piggledy unmethodically
Antonyms
systematically methodically deliberately orderly purposefully carefully organizedly