IPA: /ˈsteɪtɪdli/
KK: /ˈsteɪtɪdli/
In a manner that is declared or specified; according to what has been stated.
The meetings will be held statedly every Monday at 10 AM.
Statedly is formed from "stated" (the past participle of "state", which comes from Old French *estater*, meaning to express or declare) and "-ly" (a suffix meaning in a manner of). The word "statedly" means in a manner that is expressed or declared.
Think of someone expressing something clearly ('stated') and doing it 'in a manner' ('-ly'). This helps you remember that 'statedly' means to express something in a clear way.