IPA: /rɪˈɡɑrdləsnəs/
KK: /rɪˈɡɑrdləsnəs/
A state of not paying attention to something or not considering it important.
His regardlessness towards the rules led to serious consequences.
Regardlessness → It is formed from "regard" (from Old French *regarder*, meaning to look at or consider) and "-less" (meaning without) and "-ness" (meaning a state or condition). The word "regardlessness" means the state of being without regard or consideration.
Think of 'regard' as looking or considering something, and when you add '-less', it means without that consideration. So, 'regardlessness' is the state of not considering something.