IPA: //ˈspiːkərfoʊn//
KK: /ˈspikərˌfoʊn/
A device that allows people to talk and listen on a phone call without holding the phone, using a loudspeaker and a microphone.
We used the speakerphone during the meeting so everyone could hear the conversation.
Speakerphone → It is formed from "speaker" (from Old English "specan", meaning to speak) and "phone" (from Greek "phone", meaning voice or sound). The word "speakerphone" refers to a device that allows people to speak and hear each other through sound amplification.
Think of someone 'speaking' ('specan') and the 'voice' ('phone') being amplified — that's what a speakerphone does.