| improper | (adjective) not suitable or right or appropriate | - |
|---|
| (adjective) not appropriate for a purpose or occasion | Synonyms: wrong |
| (adjective) not conforming to legality, moral law, or social convention | Synonyms: unconventional, unlawful |
| proper | (adjective) marked by suitability or rightness or appropriateness | - |
|---|
| (adjective) appropriate for a condition or purpose or occasion or a person's character, needs | Synonyms: right |
| (adjective) having all the qualities typical of the thing specified | - |
| (adjective) limited to the thing specified | - |