study A1

/ˈstʌd.i/ To spend time learning about a subject, often at school or college.

studio B1

/ˈstjuːdiəʊ/ A room where radio or television programmes, music, or films are made.

understudy C2+

/ˈʌndɚˌstʌdi/ an actor who learns a role to substitute for the regular performer