Use 'motiveless' for actions difficult to understand, causing confusion or curiosity about the reason behind them. The detective novel was full of motiveless behavior that made the plot twist more shocking.
Pro Tip 2/3
Neutral Tone
'Motiveless' is neutral and can describe situations ambiguously, without suggesting good or bad intentions. Her motiveless decision to travel the world left her family uncertain about her happiness.
Pro Tip 3/3
Literary Usage
Writers often use 'motiveless' when creating complex characters whose actions defy easy explanation. The protagonist's motiveless choices added depth to the story.