IPA: /ˈbuːmˌbɑːks/
KK: /ˈbumˌbäks/
A portable music player that has speakers and can play music from various sources like cassette tapes, CDs, or radio.
We took the boombox to the beach to enjoy music while we relaxed.
Boombox is formed from "boom" (an onomatopoeic word representing a loud sound) and "box" (from Old English "box", meaning a container). The word "boombox" refers to a box that produces loud sounds, typically music.
Think of a 'box' that makes a 'boom' sound — that's why a boombox is a loud music player.