IPA: /ˈsmaɪlɪŋli/
KK: /ˈsmaɪlɪŋli/
In a way that shows happiness or friendliness by smiling.
She greeted everyone smilingly, making them feel welcome.
Smilingly → It is formed from "smile" (from Old English *smilan*, meaning to smile) and "-ingly" (a suffix used to form adverbs indicating manner). The word "smilingly" means in a manner that expresses a smile or with a smile.
Think of the word 'smile' and remember that 'smilingly' means doing something in a way that shows a smile.