| a. | 1. | 1. Self-originating; uncreated. |
| 2. | Without just or sufficient reason; groundless. | |
| adv. | 1. | Without cause or reason. |
| Adj. | 1. | causeless - having no justifying cause or reason; "a senseless, causeless murder"; "a causeless war that never had an aim"; "an apparently arbitrary and reasonless change" Synonyms: reasonless |
| 2. | causeless - 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" Synonyms: fortuitous, uncaused |