IPA: /ˈmɑːrʃɪər/
KK: /ˈmɑrʃiər/
More like a marsh, which means wet and soft land often covered with water and plants.
The marshier areas of the park are home to many unique species of birds.
Comparative: marshier
Superlative: marshiest
Marshier → It is formed from "marsh" (from Old English *mersc*, meaning a wetland or bog) and "-ier" (a suffix used to form comparative adjectives). The word "marshier" means more like a marsh or wetter than another area.
Think of a 'marsh' as a wetland, and the '-ier' indicates that something is more like that wetland. So, 'marshier' means more marsh-like.