IPA: //ˈɛrˌpleɪ//
KK: /ˈɛrˌpleɪ/
The act of broadcasting music or videos on radio or television, allowing people to listen to or watch them without needing to download or purchase them.
The song received significant airplay on local radio stations.
Airplay is formed from "air" (from Old English "aer", meaning the invisible gaseous substance surrounding the earth) and "play" (from Old English "plegian", meaning to engage in activity for enjoyment). The term refers to the act of streaming or playing media wirelessly through the air.
Think of 'air' as the invisible medium through which signals travel and 'play' as engaging in enjoyable activities — together, they describe the act of enjoying media streamed wirelessly.
No commonly confused words.