immodest

As adjectives the difference between immodest and vulgar

is that immodest is lacking in modesty; shameless while vulgar is debased, uncouth, distasteful, obscene.

As adjectives the difference between immodest and licentious

is that immodest is lacking in modesty; shameless while licentious is lacking restraint, or ignoring societal standards, particularly in sexual conduct.

As a noun taxonomy

is the science or the technique used to make a classification.

As an adjective immodest is

lacking in modesty; shameless.

As adjectives the difference between arrogant and immodest

is that arrogant is having excessive pride in oneself, often with contempt for others while immodest is lacking in modesty; shameless.