impersistent /im-pər-sisˈtənt/

1. Not persistent
2. Not enduring

• beastly-heads
• beast of burden
• beast of prey
• beasts
• beasts of burden
• beasts of chase
• beasts of warren
• be a sucker for
• beat
• beatable
• beat about the bush
• beatae memoriae
• be at a loose end
• beat a record
• beat a retreat
• be at bay
• beatbox
• beatboxed
• beatboxes
• beatboxing
• beat down
• beat-'em-up
• beaten
• beater
• beaters