IPA: /ˈmɒs.i.ɪst/
KK: /ˈmɔsiɪst/
Having the most moss; covered with the greatest amount of moss.
The mossiest part of the forest was a beautiful green carpet.
Comparative: mossier
Superlative: mossiest
Mossiest → It is formed from "moss" (from Old English *mos*, meaning a type of small, green plant that grows in damp places) and "-iest" (a superlative suffix meaning most). The word "mossiest" means having the most moss or being covered with the most moss.
Think of the word 'moss' as a small green plant that thrives in damp areas, and remember that 'mossiest' describes something that has the most of this green plant.