I am wondering if tuples of words such as:

  * 聞く、聴く、訊く
  * 効く、利く
  * 硬い、固い、堅い

which are homophones with only a very nuanced difference in meaning, have a
name and whether or not they've been studied by linguists. (I am particularly
curious about the emergence of such tuples and why it doesn't seem like each
tuple will merge into one single word any time soon.)
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2022-03-29T19:43:20.993
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2022-03-29T19:43:20.993
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question
homophonic-kanji homonyms
On homophonic tuples of words with slight differences in meaning