IPA: /ˈʃeɪmləsli/
KK: /ˈʃeɪmləsli/
In a way that shows no shame or embarrassment; acting boldly without regard for what others think.
She shamelessly asked for a raise after only a month on the job.
Shamelessly → It is formed from "shame" (from Old English *sceamu*, meaning a feeling of guilt or disgrace) and "-less" (meaning without) combined with the adverbial suffix "-ly" (meaning in a manner of). The word "shamelessly" means in a manner that is without shame or guilt.
Think of being 'without' ('-less') a feeling of 'guilt' ('shame') — that's why shamelessly means acting without any shame.