IPA: //ˈteɪl.læmp//
KK: /ˈteɪlˌlæmp/
A light at the back of a vehicle that indicates when the vehicle is stopping or turning.
The taillamp of the car was broken, so I had to replace it before driving at night.
Taillamp → It is formed from "tail" (from Old English *tægel*, meaning the rear part) and "lamp" (from Old French *lampe*, meaning a device that produces light). The word "taillamp" refers to a light located at the rear part of a vehicle.
Think of the 'rear part' ('tail') of a vehicle being illuminated by a 'light' ('lamp') — that's what a taillamp does.
No commonly confused words.