IPA: /ˈflætərɪŋli/
KK: /ˈflætərɪŋli/
In a way that praises someone or something, often excessively or insincerely.
She spoke flatteringly about her colleague's work, hoping to gain favor.
Flatteringly → It is formed from "flatter" (from Old French *flatter*, meaning to praise or compliment) and "-ingly" (a suffix used to form adverbs indicating manner). The word "flatteringly" means in a manner that praises or compliments someone.
Think of the word 'flatter' which means to praise someone, and remember that 'flatteringly' describes doing so in a specific manner.