IPA: /ˈɛfərtləsli/
KK: /ˈɛfərtləsli/
In a way that requires little or no effort; easily and smoothly.
She completed the task effortlessly, making it look easy.
Effortlessly → It is formed from "effort" (from Old French *esforcier*, meaning to exert oneself) and "-lessly" (meaning without). The word "effortlessly" means without exerting effort or with ease.
Think of doing something with no exertion or struggle — 'effort' means to exert oneself, and '-lessly' indicates the absence of that effort.