Monday words: pluvial, alluvial

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pluvial (plv-l)
adj.:
1. Of or relating to rain.
2. Characterized by abundant rain.
3. Of a geologic change resulting from the action of rain.
noun:
1. A prolonged period of abundant rainfall.

Etymology:  Latin, from pluere, to rain or flow.

Alluvial (-lv-l)
adj.:
1. Of or relating to alluvium (sediment deposited by flowing water).

Etymology:  Latin, from alluere, to wash against.