Synonyms of causeless

Adjective

1. causeless, reasonless, unmotivated (vs. motivated)

usage: having no justifying cause or reason; "a senseless, causeless murder"; "a causeless war that never had an aim"; "an apparently arbitrary and reasonless change"

2. causeless, fortuitous, uncaused, unintended (vs. intended)

usage: having no cause or apparent cause; "a causeless miracle"; "fortuitous encounters--strange accidents of fortune"; "we cannot regard artistic invention as...uncaused and unrelated to the times"