This is the 2518th most frequent Russian word.
радио
"Radio" - a device or system for transmitting and receiving sound or information through electromagnetic waves.
Here, 'радио' is used as a noun referring to the medium through which audio broadcasts are received.
Я слушаю радио каждый день.
I listen to the radio every day.
In this sentence, 'радио' represents the physical radio device capable of receiving radio transmissions.
Мы подарили бабушке новое радио.
We gifted grandma a new radio.
Here, 'радио' refers to a broadcasting station or service relaying information or entertainment via radio waves.