brim [brɪm]

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n.帽檐，（容器的）边，边缘；vi.注满，充溢

the bottom part of a hat that sticks out all round

The glass was full to the brim. 玻璃杯中的液体已满到要溢出来了。
She was filled to the brim with happiness. 她充满了幸福。