IPA: /ˈɑːrtləsnəs/
KK: /ˈɑrtləsnəs/
The quality of being simple, innocent, or without deceit; a lack of sophistication or guile.
Her artlessness made her charming and approachable, as she spoke her mind without pretense.
Artlessness → It is formed from "art" (from Old French *art*, meaning skill or craft) and "-lessness" (meaning without). The word "artlessness" refers to the state of being without artifice or skill, often implying innocence or simplicity.
Think of being 'without' ('-lessness') any 'skill' or 'craft' ('art') — that's why artlessness means a lack of deceit or sophistication.