Rude is an adjective that qualifies one who has not been cultivated, who is uncultivated, uneducated.
Rude also characterizes the unpolished, the rough, or the surface uneven.
In the figurative sense "rude" means one who is rude, stupid, impolite, who has bad manners.
The expression "rude people" refers to a people not very polite, who are harsh, with bad manners. The term "rough work" refers to heavy, hard, rigorous work that does not require much preparation.
Rude is synonymous with "obtuse", which refers to that which is rounded, which is not sharp, and also rude, dull and stupid. Rude is also synonymous with "jerk", which characterizes that person who is cocky, rude and ignorant. It is also synonymous with "rough", which means as nature came, uncut and rough.
Words can also be characterized as rude, coarse, impolite. In order to soften them, they can be replaced by more pleasant, polite and less rude expressions. This type of language is called "euphemism". Ex: "You missed the truth". In place of "You are a liar". "He lives on charity". In place of "He lives on alms". "He's not young anymore." In place of "He's an old man".
A masculine lifestyle can also be considered rude, conservative, without vanity, they are those who are not involved with fashion, with perfection of the physical shape, that do not use beauty products, that fit in the style called retrosexual, which is the inverse of the style metrosexual.