Kovush:

• Standard kovush - liquid, movement, time, depth;
• Kashering;
• Fast kovush - tzir, charif.

See seforim by Rabbi Cohen at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠www.kashrushalacha.com