improper

adj.

[1]	wrong , mistaken , erroneous , false , incorrect , inaccurate , inexact , imprecise , amiss , faulty , untrue , irregular , abnormal
[2]	unfit , unconventional , unlawful , unsuitable , inappropriate , inapt , inapplicable , infelicitous , incongruous , unsuited , unseemly , unbefitting , unfitting , uncalled-for , inapposite , malapropos , out of keeping , out of place , incompatible , inopportune
[3]	indecorous , wrong , indecent , indelicate , immodest , unseemly , untoward , unbecoming , impolite , suggestive , off colour , obscene , corrupt , immoral , sinful , wicked , lewd , lascivious