improper

adjective
1
dishonest, or morally wrong
غیراخلاقی, ناپسند, ناشایست
opposite proper
2
not right or appropriate for the situation
نامناسب, نادرست, ناشایست, غیرمقتضی
It would be improper to comment at this stage.
opposite proper
3
wrong; not correct
نادرست, غلط, نامناسب
improper use of the drug