Radio – el radio (m)/ la radio (f)
Note: Masculine or feminine noun depending on the meaning:
El radio (m) - for the communication of programmes or messages.
La radio (f) - for the set (device).
To remember that radio is pronounced rrah-dyoh (radio) in Spanish, use the following mnemonic:
I could hear the radio blasting out our new rap that we'd just finished in the studio (radio).