IPA: //ˌæn.tiˈæk.ni//
KK: /ˈæntiˌækni/
Describing something that helps to prevent or reduce acne.
She uses an antiacne cream to keep her skin clear.
Antiacne → It is formed from "anti-" (meaning against) and "acne" (from Greek "akmē", meaning point or peak, referring to the skin condition). The word "antiacne" means against acne or preventing acne.
Think of 'against' ('anti-') the skin condition known as acne — that's what antiacne products aim to do.