粗糙的
粗俗的
非精制的（ coarse的最高级 ）

Coarse \Coarse\ (k[=o]rs), a. [Compar. {Coarser}
(k[=o]rs"[~e]r); superl. {Coarsest}.] [As this word was
anciently written course, or cours, it may be an abbreviation
of of course, in the common manner of proceeding, common, and
hence, homely, made for common domestic use, plain, rude,
rough, gross, e. g., ``Though the threads be course.''
--Gascoigne. See {Course}.]
1. Large in bulk, or composed of large parts or particles; of
inferior quality or appearance; not fine in material or
close in texture; gross; thick; rough; -- opposed to
{fine}; as, coarse sand; coarse thread; coarse cloth;
coarse bread.

2. Not refined; rough; rude; unpolished; gross; indelicate;
as, coarse manners; coarse language.

I feel
Of what coarse metal ye are molded. --Shak.

To copy, in my coarse English, his beautiful
expressions. --Dryden.

Syn: Large; thick; rough; gross; blunt; uncouth; unpolished;
inelegant; indelicate; vulgar.