IPA: /ˈstɔːl.wərt.li/
KK: /ˈstɔl.wɚt.li/
In a strong and loyal manner, showing determination and support.
She stalwartly defended her friend during the argument.
Stalwartly → It is formed from "stalwart" (from Middle English *stalworth*, meaning strong and brave) and the suffix "-ly" (meaning in a manner of). The word "stalwartly" means in a manner that is strong and brave.
Think of someone acting in a strong and brave way — that's what 'stalwartly' means, as it describes doing something with strength and courage.