haphazard

hap‧haz‧ard

happening or done in a way that is not planned or organized

a haphazard way/manner/fashion

I continued my studies in a rather haphazard way.

Educational provision in the country is haphazard.

—haphazardly adverb:

bushes growing haphazardly here and there

My approach to the problem was haphazard.