inundated

Definitions:

Overflowed.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)

Usage examples:

In the smoother spaces, trout splashed; the reflections of the hills showed in the great expanse as the light wind lessened, allowing the surface to become glass- like, revealing also the twisted roots and dead branches of trees long inundated in forming the big basin of water.
- The White Desert by Courtney Ryley Cooper
The road emerged in oases of mud from long, inundated spaces.
- The Emigrant Trail by Geraldine Bonner
To one who knew, it was possible, though dangerous beyond words, to cross the inundated country that lay between the Belgian Front and the German lines, and even with good luck to go farther.
- The Amazing Interlude by Mary Roberts Rinehart