IPA: /rɪˈɡɑrdlɪsli/
KK: /rɪˈɡɑrdlɪsli/
In a way that shows no consideration or attention to something.
She continued to speak regardlessly, ignoring the interruptions around her.
Regardlessly → It is formed from "regard" (from Old French *regarder*, meaning to look at or consider) and "-less" (meaning without). The word "regardlessly" means without regard or consideration for something.
Think of 'regard' as looking at something, and '-less' means without. So, regardlessly means not looking at or considering something.