undrained
1. [ adjective ] not drained
Examples:

"preserve wetlands keep them undrained"

Related terms: drained
Similar spelling:   untrained
  unadorned
  untried
  undried
  undraped
  untrimmed
  untreated
  undreamed
  undrawn
  undrape
  underage
  undreamed_of
  unaddressed
  untrustiness
  untracked
  undressed
  unturned
  untrue