现场投注

• 土(earth; soil; land)RADICAL
• 勿(don't; must not)PHONETIC

A wide field of land sounds similar to the word for things or objects.

• 扌(hand)RADICAL
• 殳(weapon for throwing/striking)PHONO-SEMANTIC

A hand holding a weapon thrown forward is the motion of surrender or attack.

• 氵(water; liquid)RADICAL
• 主(master; center)PHONO-SEMANTIC

Water concentrated at one central point is the meaning of the character 注.