Describes a person or their behavior as lacking refinement, often in a physical or surface-level way; can refer to rough manners, sloppy appearance, or careless actions.
Focuses on interpersonal insensitivity: thoughtless remarks, lack of consideration, or boorish behavior that offends or annoys others.
He opened the box with rough, clumsy hands.
He's a person with a coarse way of speaking.
I said something tactless and made her angry.
That person is rude and doesn't consider others' feelings.
Hiragana spelling is standard; no kanji form exists.
Katakana spelling used for emphasis or in casual writing.
The origin is uncertain. It may be a sound-symbolic word (mimetic) suggesting roughness or coarseness, but the exact derivation is unclear.