IPA: /ˈhaɪˌlaɪtə/
KK: /ˈhaɪˌlaɪtər/
A tool used to mark important text or to enhance features on the face, often with bright colors or fluorescent ink.
She used a yellow highlighter to mark the key points in her notes.
Highlighter → It is formed from "high" (from Old English "heah", meaning tall or elevated) and "lighter" (from the verb "light" meaning to illuminate or make bright). The word "highlighter" refers to a tool that makes text stand out by illuminating it with bright colors.
Think of something that makes text 'tall' or 'elevated' ('high') and 'bright' ('lighter') — that's why a highlighter is used to illuminate important information.
No commonly confused words.