淹头搭脑

• 氵(water; liquid)RADICAL
• 奄(cover; envelop)PHONO-SEMANTIC

Water covering and flooding everything below is the meaning of the character 淹.

• 大(large; big)RADICAL
• ⺀(two dots indicating hair; top of head)ASSOCIATIVE

The head is the largest and most prominent part on the human body.

• 扌(hand; arm)RADICAL
• 荅(small bean plant; phonetic)PHONETIC

Using your hand to pull up and cross over—that is the action of connecting or joining together.