a. 无教养的, 粗俗的, 不雅的

Indelicate \In*del"i*cate\, a. [Pref. in- not + delicate: cf. F.
ind['e]licat.]
Not delicate; wanting delicacy; offensive to good manners, or
to purity of mind; coarse; rude; as, an indelicate word or
suggestion; indelicate behavior. --Macaulay. --
{In*del"i*cate*ly}, adv.

Syn: Indecorous; unbecoming; unseemly; rude; coarse; broad;
impolite; gross; indecent; offensive; improper;
unchaste; impure; unrefined.