swamp

nouns

low land that is seasonally flooded; has more woody plants than a marsh and better drainage than a bog
is derived from
a situation fraught with difficulties and imponderables
"he was trapped in a medical swamp"
is a type of (narrower)
a complex or critical or unusual difficulty
"the dangerous situation developed suddenly"; "that's quite a situation"; "no human situation is simple"

verbs

drench or submerge or be drenched or submerged
"The tsunami swamped every boat in the harbor"
fill quickly beyond capacity; as with a liquid
"the basement was inundated after the storm"; "The images flooded his mind"