Swamp

Merriam-Webster Online Dictionary
swamp (noun)
1.
a wetland often partially or intermittently covered with water , especially one dominated by woody vegetation
2.
a tract of swamp
3.
a difficult or troublesome situation or subject
swamp (verb)
transitive verb
1.
a) to fill with or as if with water - inundate submerge
b) to overwhelm numerically or by an excess of something - flood swamped with work
2.
intransitive verb
to open by removing underbrush and debris to become submerged