characterized by lack of order or planning, by irregularity, or by randomness; determined by or dependent on chance; aimless.

haphazardly.

mere chance; accident.

adjective

careful , designed , intentional , methodical , organized , planned , straight , systematic , thought-out

adjective

accidental , aimless , all over the map , any old way , any which way , arbitrary , careless , casual , chance , designless , desultory , devil-may-care * , disorderly , disorganized , erratic , fluke , helter-skelter * , hit-or-miss * , incidental , indiscriminate , irregular , loose , offhand , purposeless , random , reckless , slapdash , slipshod , spontaneous , sudden , unconcerned , unconscious , unconsidered , uncoordinated , unexpected , unmethodical , unorganized , unpremeditated , unsystematic , unthinking , willy-nilly * , hit-or-miss , spot , unplanned , chaotic , helter-skelter , undirected