中国海事局

• 口(mouth; rectangular frame)ASSOCIATIVE
• 丨(vertical line through the middle; axis)ASSOCIATIVE

An arrow hitting the center of a target frame is the bull's-eye—that's CENTER.

• 囗(surround; enclose)RADICAL
• 玉(precious jade; gem)ASSOCIATIVE

A nation is enclosed land that contains precious treasures within.

• 氵(water; liquid)RADICAL
• 每(each; always)PHONO-SEMANTIC

The sea is a vast expanse of water that stretches boundlessly every day.

• ⼅(hook; fishhook)RADICAL
• 口(mouth; speech)ASSOCIATIVE
• 彐(hand holding brush)ASSOCIATIVE

Using your hand to hold a brush and write down important spoken words from beginning to end is work.

• 尸(body; cover)RADICAL
• 口(mouth; door)ASSOCIATIVE

A mouth confined under a roof is restricted to a limited scope.