ponds and swamps
Refers to bodies of water such as ponds and marshes collectively. Not a common everyday word; more likely to appear in descriptive or literary contexts.
Many ponds and swamps are scattered throughout this area.
retard; mentally disabled person
Internet slang, derogatory. A homophone of 知障 (intellectual disability), used as a slur. Strongly offensive; not for polite use.
See also: 知障
Writing '池沼' online is a discriminatory term, so you should stop.