Comparative form of marshy: more marshy(adjective)
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Use "marshier" in a sentence
"Accept that argument – that this is about preserving communities, not just independent retailers – and you enter a field of debate far wider and marshier than any short review can justly navigate."
"The land grew marshier, inlets appeared, and soon we traveled over the bridge to the island."
"Although Sen pays homage to Reason as a force of transcendence ( "it helps us to transcend ideology and blind belief"), the grounds of his discourse may be marshier than he admits."