marshes is a form of:

Pitching



ជាទម្រង់ Gerund ឬ Present Participle នៃ pitch
ENGLISH MEANING
noun
1.
The act of throwing or casting; a cast; a pitch; as, wild pitching in baseball.
2.
The rough paving of a street to a grade with blocks of stone.
3.
A facing of stone laid upon a bank to prevent wear by tides or currents.