| not formal | hasty and without attention to detail; not thorough |
| used of spoken and written language | not showing effort or strain |
| having or fostering a warm or friendly and informal atmosphere | occurring on a temporary or irregular basis |
| not officially recognized or controlled | 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 |