marshes
n. plural-only B2 Upper Intermediate US //ˈmɑɹʃəz// UK //mˈɑːʃɪz// marsh·es
n. low, wet lands that are often flooded. They are usually covered with tall grass and plants rather than trees.
n. areas of low-lying land that are flooded in wet seasons or at high tide, and typically remain waterlogged at all times. Characterised by herbaceous rather than woody vegetation.
The birds build their nests in the tall grass of the marshes.
After the heavy rains, the fields near the river turned into thick marshes that were impossible to cross.
The coastal marshes serve as a vital buffer against storm surges, absorbing the energy of the waves before they can reach the inland settlements.
Usage
While 'marsh' is a countable noun, the plural form 'marshes' is frequently used to describe a broad geographical region or ecosystem.