DI-3

('di' in the third tone)

Some 64 standard Chinese characters have a 'di' pronunciation. Common sound-defining components of more complicated characters are: 氐 (11 occurences), 帝 (11),  弟 (7)

底 = bottom, base; used to designate bottom-located radicals in Chinese writing.

走字底 = zou(3)zi(4) di(3) = the bottom  'leave' character of the Chinese  wriring system: 辶