The word ouji for example has over 20 different meanings, consisting of a ton of different kanji corresponding to the pronounciations "ou" and "ji".
王 ou = king, 子 ji = child -> prince
欧 ou = alphabet, 字 ji = letter -> roman letter
往 ou = long before, 時 ji = period -> ancient times
etc.
You just have to know what kanji is meant or try to figure it out from the context.

So not my cup of tea!