IPA: /ˈtɒpˌkoʊt/
KK: /ˈtɑpˌkoʊt/
A light coat worn over other clothing, often used for protection against the weather.
She wore a stylish topcoat over her dress to keep warm.
Topcoat → It is formed from "top" (from Old English *toppa*, meaning the highest part) and "coat" (from Old French *cote*, meaning a covering or garment). The word "topcoat" refers to a coat that is worn over other clothing, typically the outermost layer.
Think of the 'highest part' ('top') that serves as a 'covering' ('coat') — that's why a topcoat is the outer layer of clothing.
No commonly confused words.