IPA: /ˈstɔːntʃli/
KK: /stɔntʃli/
In a firm and loyal way, showing strong support or commitment to something.
She staunchly defended her friend during the argument.
**Staunchly** → It is formed from "staunch" (from Old French *estanch*, meaning to stop or hold back) and the adverbial suffix "-ly" (meaning in a manner of). The word "staunchly" means in a manner that is steadfast or loyal, holding firm to a position.
Think of being steadfast or loyal, as if you are 'holding back' or 'stopping' any doubts — that's why staunchly means to do something in a loyal manner.