Found 2 items, similar to motiveless.
English → English (WordNet) Definition: motiveless motiveless adj : occurring without motivation or provocation; “motiveless malignity”; “unprovoked and dastardly attack”- F.D.Roosevelt [syn: unprovoked, wanton]
English → English (gcide) Definition: Motiveless Motiveless \Mo"tive*less\, a. Destitute of a motive; not incited by a motive. -- Mo"tive*less*ness, n. --G. Eliot. [1913 Webster]