IPA: /ˈrɒk.i.ɪst/
KK: /ˈrɑːkɪəst/
The most full of rocks or difficult to walk on due to many rocks.
The rockiest path in the park is also the most beautiful.
Comparative: rockier
Superlative: rockiest
Rockiest → It is formed from "rock" (from Old English *rocc*, meaning a solid mineral material) and the suffix "-iest" (meaning most). The word "rockiest" describes the state of being the most rocky or having the greatest amount of rocks.
Think of the word 'rock' as a solid material, and remember that 'rockiest' means having the most rocks.