Plural of boombox; multiple large portable stereo music players.
Regular English plural formation from 'boombox' by adding '-es' to words ending in 'x', following standard English morphology rules established centuries ago.
Regular plurals like 'boomboxes' seem simple, but they show how English handles sound changes—we say 'boomboxes' not 'boomboxs' because our mouths naturally add a vowel before final consonants like 'x'!
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