1. Cheerfully irresponsible
   - carefree, devil-may-care, freewheeling, harum-scarum, slaphappy

See also: irresponsible

• artifactual
• artifice
• artificer
• artificial
• artificial additive
• artificial blood
• artificial flower
• artificial heart
• artificial horizon
• artificial insemination
• artificial intelligence
• artificial joint
• artificial kidney
• artificial lake
• artificial language
• artificial pacemaker
• artificial respiration
• artificial satellite
• artificial skin
• artificiality
• artificially
• artillery
• artillery fire
• artillery plant
• artillery shell