| marked by lack of attention or consideration or forethought or thoroughness; not careful | hasty and without attention to detail; not thorough |
| effortless and unstudied | not showing effort or strain |
| (usually followed by `of') without due thought or consideration | occurring on a temporary or irregular basis |
| | 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 |