IPA: /ˈstɜːrdɪnəs/
KK: /ˈstɜrdɪnɪs/
The quality of being strong and solid, able to withstand pressure or damage.
The sturdiness of the table made it perfect for heavy use in the workshop.
Sturdiness → It is formed from "sturdy" (from Middle English *sturdie*, meaning strong or brave) and the suffix "-ness" (meaning the state or quality of). The word "sturdiness" refers to the quality of being strong or robust.
Think of the word 'sturdy' which means strong, and remember that 'sturdiness' is the quality of being strong.