English

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Etymology

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rain +‎ wash

Noun

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rainwash (countable and uncountable, plural rainwashes)

  1. (geography) The washing action of rain, capable of erosion and transporting soil.
  2. A deposit formed by rain.

Verb

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rainwash (third-person singular simple present rainwashes, present participle rainwashing, simple past and past participle rainwashed)

  1. To wash by the action of rain.