couth

1. (auxiliary verb, defective) To know how to; to be able to.

   She can speak English, French, and German.   I can play football.   Can you remember your fifth birthday?

2. (modal auxiliary verb, defective) May; to be permitted or enabled to.

   You can go outside and play when you're finished with your homework.   Can I use your pen?

3. (modal auxiliary verb, defective) To have the potential to; be possible.

   Animals can experience emotions.

4. (auxiliary verb, defective) Used with verbs of perception.

   Can you hear that?.

5. To know.

1. Familiar, known; well-known, renowned.
2. Variant of couthie.

1. Social grace, refinement, sophistication; etiquette, manners.

   That man has no couth.

2. A person with social graces; a refined or sophisticated person.

adjective

Marked by or possessing a high degree of sophistication; cultured, refined.