Motiveless

• (a.) Destitute of a motive; not incited by a motive.
Found on http://thinkexist.com/dictionary/meaning/motiveless/

motiveless

unprovoked adjective occurring without motivation or provocation; `motiveless malignity`; `unprovoked and dastardly attack`- F.D.Roosevelt
Found on https://www.encyclo.co.uk/local/20974

Motiveless

Mo'tive·less adjective Destitute of a motive; not incited by a motive. -- Mo'tive*less*ness , noun G. Eliot.
Found on http://www.encyclo.co.uk/webster/M/106

motiveless

[adj] - occurring without motivation or provocation
Found on http://www.webdictionary.co.uk/definition.php?query=motiveless
No exact match found