All proper antonyms

adj proper

• unsuitable — not suitable; inappropriate; unfitting; unbecoming.
• inappropriate — not appropriate; not proper or suitable: an inappropriate dress for the occasion.
• unsuited — appropriate: She is suited to such a job.
• unseemly — not seemly; not in keeping with established standards of taste or proper form; unbecoming or indecorous in appearance, speech, conduct, etc.: an unseemly act; unseemly behavior.
• unacceptable — capable or worthy of being accepted.
• crass — Crass behaviour is stupid and does not show consideration for other people.
• objectionable — causing or tending to cause an objection, disapproval, or protest.
• incorrect — not correct as to fact; inaccurate; wrong: an incorrect statement.
• substandard — below standard or less than adequate: substandard housing conditions.
• unconventional — not conventional; not bound by or conforming to convention, rule, or precedent; free from conventionality: an unconventional artist; an unconventional use of material.
• improper — not proper; not strictly belonging, applicable, correct, etc.; erroneous: He drew improper conclusions from the scant evidence.
• unfitting — suitable or appropriate; proper or becoming.
• crude — A crude method or measurement is not exact or detailed, but may be useful or correct in a rough, general way.
• misbehaving — to behave badly or improperly: The children misbehaved during our visit.
• general — of or relating to all persons or things belonging to a group or category: a general meeting of the employees.
• inaccurate — not accurate; incorrect or untrue.
• inexact — not exact; not strictly precise or accurate.
• dishonest — not honest; disposed to lie, cheat, or steal; not worthy of trust or belief: a dishonest person.
• imprecise — not precise; not exact; vague or ill-defined.
• bad — If you say that it is bad that something happens, you mean it is unacceptable, unfortunate, or wrong.
• corrupt — Someone who is corrupt behaves in a way that is morally wrong, especially by doing dishonest or illegal things in return for money or power.
• questionable — of doubtful propriety, honesty, morality, respectability, etc.: questionable activities; in questionable taste.
• false — not true or correct; erroneous: a false statement.
• careless — If you are careless, you do not pay enough attention to what you are doing, and so you make mistakes, or cause harm or damage.