coarser , coarsest
Coarse things have a rough texture because they consist of thick threads or large pieces.
rough
a jacket made of very coarse cloth.
用非常粗糙的布做成的一件夹克衫。
If you describe someone as coarse, you mean that he or she talks and behaves in a rude and offensive way.
vulgar , crude
The soldiers did not bother to moderate their coarse humour in her presence.
这些当兵的当着她的面仍然开着粗俗的玩笑,懒得有所收敛。