Synonyms of the word

improper

• adj. unsuitable to needs or circumstances; inappropriate; inapt.
• adj. Not in keeping with conventional mores or good manners; indecent or immodest.
• adj. Not according to facts; inaccurate or erroneous.
• adj. Not consistent with established facts; incorrect.
• adj. Not properly named; See, for example, improper fraction.
• adj. (obsolete) Not specific or appropriate to individuals; general; common.
• v. (obsolete, transitive) To appropriate; to limit.
• v. (obsolete) To behave improperly.

inappropriate

• adj. Not appropriate; not suitable for the situation, time, or place.

incorrect

• adj. Not correct; erroneous or wrong.
• adj. Faulty or defective.
• adj. Inappropriate or improper.

indecent

• adj. offensive to good taste.
• adj. not in keeping with conventional moral values; improper, immodest or unseemly.

indecorous

• adj. improper, immodest or indecent.

indelicate

• adj. Improper or immodest.
• adj. Coarse or tasteless.
• adj. Tactless or undiplomatic.

irregular

• adj. Nonstandard; not conforming to rules or expectations.
• adj. Of a surface, rough.
• adj. Without symmetry, regularity, or uniformity.
• adj. (geometry, of a polygon) Not regular; having sides that are not equal or angles that are not equal.
• adj. (geometry, of a polyhedron) Whose faces are not all regular polygons (or are not equally inclined to each…
• n. A soldier who is not a member of an official military force and, often, does not follow regular army tactics.
• n. One who does not regularly attend a venue.

unbecoming

• adj. Not flattering, attractive or appropriate.
• adj. Not in keeping with the expected standards of one's position.
• v. present participle of unbecome.
• n. The process by which something unbecomes.

uncomely

• adj. Not comely.
• adv. In an uncomely way; inappropriately, unappealingly.

unconventional

• adj. Not adhering to convention or accepted standards.
• adj. Out of the ordinary.
• adj. Atypical.
• n. Something or someone that is unconventional.

unfit

• adj. Not fit; not having the correct requirements.
• adj. Not fit, not having a good physical demeanor.
• v. To make unfit; to render unsuitable, spoil, disqualify.

unlawful

• adj. Prohibited; not permitted by law (either civil or criminal law; see illegal).

unseemly

• adj. Inconsistent with established standards of good form or taste.

unsuitable

• adj. Not suitable; unfit; inappropriate.

untoward

• adj. Unfavourable, adverse, or disadvantageous.
• adj. Unruly, troublesome.
• adj. Unseemly, improper.

wrong

• adj. Incorrect or untrue.
• adj. Asserting something incorrect or untrue.
• adj. Immoral, not good, bad.
• adj. Improper; unfit; unsuitable.
• adj. Not working; out of order.
• adj. Designed to be worn or placed inward; as, the wrong side of a garment or of a piece of cloth.
• adj. (obsolete) Twisted; wry.
• adv. (informal) In a way that isn't right; incorrectly, wrongly.
• n. Something that is immoral or not good.
• n. An instance of wronging someone (sometimes with possessive to indicate the wrongdoer).
• n. The incorrect or unjust position or opinion.
• n. The opposite of right; the concept of badness.
• v. To treat unjustly; to injure or harm.
• v. To deprive of some right, or to withhold some act of justice.
• v. To slander; to impute evil to unjustly.