This article is from the Japanese FAQ, by TANAKA Tomoyuki tanaka@cs.indiana.edu and Olaf Meeuwissen olaf@IMSL.shinshu-u.ac.jp with numerous contributions by others.
Apart from the obvious too many, you mean? Approximately 50,000.
And what's more, this staggeringly big number seems to have been
reached as early as around the end of the second century AD! To
give you some idea, many concise bilingual dictionaries carry a
comparable number of entries for each language.
 
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