C2 noun /əˈluːviən/
alluvion
Alluvion
Meaning
The gradual increase of land by the deposit of soil from water; also, a flood or overflow of water.
Example
The river’s alluvion added new fertile land to the village fields.
Die Alluvion des Flusses fügte den Feldern des Dorfes neues fruchtbares Land hinzu.