Individual #etymology.studies  the study of the sources and development of words
  >part:  lexicostatistics  a statistical technique used in glottochronology; used to estimate how long ago different languages evolved from a common source language
  >part of:  linguistics  the scientific study of language
  >part of:  historical_linguistics__diachronic_linguistics__comparative_linguistics__comparativelinguistic  the study of linguistic change
     >part of:  linguistics  the scientific study of language

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