| hasty and without attention to detail; not thorough | marked by lack of attention or consideration or forethought or thoroughness; not careful |
| not showing effort or strain | effortless and unstudied |
| occurring on a temporary or irregular basis | (usually followed by `of') without due thought or consideration |
| marked by blithe unconcern | |
| appropriate for ordinary or routine occasions | |
| occurring or appearing or singled out by chance | |
| natural and unstudied | |
| characterized by a feeling of irresponsibility | |
| without or seeming to be without plan or method; offhand | |