marshland- russian
ма́ршевый
march-, marching, of a march
flight- (of stairs), straight-flight (staircase)
sustainer (engine), main (engine)
marsh- (coastal lowland), marshland-
поле́сье
woodlands, wooded district, wooded marshland
Examples
Плотина заболачивает окрестные земли постепенно.
The dam is gradually turning the surrounding land into marshland.
Река заболачивает низину каждую весну.
Every spring, the river turns the lowland into marshland.
Заболачивавший поля ручей давно перекрыли.
The stream that was turning the fields into marshland was blocked off long ago.



















