DI-4

('di' in the fourth 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)

地 = earth, land

地板 = di(4)ban(3) = floor (of a room or building)

板 = ban(3) = board (flat piece of hard material)

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地址 = di(4)zhi(3) = address

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弟 = younger brother

The usual form is duplicated, even if there is only one younger brother.

弟弟 = di(4)di = younger brother, younger brothers

哥哥 = ge()ge() = older brother(s)

Please note: even if the reference is only to one older brother, it's not just 哥, but 哥哥.

An alternative word for elder brother is:

兄 = xiong(1) = elder brother

兄弟 = xiong(1)di(4) = brothers (if there is at least one older and one younger)

兄 is never used alone. If there is no younger brother to be referred to, the following term is used:

兄长 = xiong(1)zhang(3) = brother, brothers (if he or all are older)