IPA: /ˈrɒkɪnəs/
KK: /ˈrɑkɪnɪs/
The condition of having many rocks or being rough and uneven.
The rockiness of the terrain made it difficult to hike.
Rockiness → It is formed from "rock" (from Old English *rocc*, meaning a large stone or boulder) and "-iness" (meaning the quality of being). The word "rockiness" refers to the quality of being rocky or having many rocks.
Think of the word 'rock' to remember that 'rockiness' means the quality of being full of rocks.