请勿打扰

• 言(words; speech)RADICAL
• 青(blue-green; clear)PHONO-SEMANTIC

Clear and sincere words are the way to ask permission or invite someone else.

• 勹(wrap; curl)RADICAL
• 丿丿(two strokes representing erasure; erased object)ASSOCIATIVE

Two diagonal strokes inside a circle represent prohibition and denial — don't do it!

• 扌(hand)RADICAL
• 丁(nail; craftsman)PHONO-SEMANTIC

Using your hand to drive a nail is the action of hitting or striking something hard.