IPA: /ˈstɜːrdɪli/
KK: /ˈstɜr.dɪ.li/
In a strong and solid way, able to withstand pressure or force.
The table was built sturdily, so it could hold heavy objects without wobbling.
Sturdily → It is formed from "sturdy" (from Middle English *sturdie*, meaning strong or robust) and the suffix "-ly" (meaning in a manner of). The word "sturdily" means in a strong or robust manner.
Think of being strong or robust ('sturdy') and how that strength is expressed in a manner ('-ly'). This helps you remember that 'sturdily' means to do something in a strong way.