motiveless
Without a motiveWithout a motive.
» The police are investigating a motiveless murder.
Meaning
1 senses(not comparable)Without a motive.
This seems to have been a motiveless crime: no money was stolen, and nobody had cause to hate the victim.
occurring without motivation or provocation
Examples
1 sentencesThe police are investigating a motiveless murder.
Synonyms
2 synonymsClose in meaning
- occurring without motivation or provocation:unprovokedwanton