IPA: /ˈlɪpˌstɪk/
KK: /ˈlɪpˌstɪk/
A small stick used to color the lips, usually made of wax and enclosed in a tube.
She applied bright red lipstick before going out.
Lipstick → It is formed from "lip" (from Old English "lippa", meaning the edge of the mouth) and "stick" (from Old English "sticca", meaning a small piece or stick). The word "lipstick" refers to a stick used to color or adorn the lips.
Think of the 'edge of the mouth' ('lip') being adorned with a 'stick' — that's why lipstick is used to color the lips.