Cause·less, a. 1. Self-originating; uncreated.
  2. Without just or sufficient reason; groundless.
     My fears are causeless and ungrounded.   --Denham.
  Cause·less, adv. Without cause or reason.
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  causeless
       adj 1: having no justifying cause or reason; "a senseless,
              causeless murder"; "a causeless war that never had an
              aim"; "an apparently arbitrary and reasonless change"
              [syn: reasonless]
       2: 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" [syn: fortuitous, uncaused]