understudy
Pronunciation:
/ˈʌndəˌstʌdi//ˈʌndɚˌstʌdi/noun
Definitions
A performer who understudies; a standby.
Synonyms:standby
verb
Definitions
To study or know a role to such an extent as to be able to replace the normal performer when required.
To act as an understudy (to someone).
To act in a similar manner to some known person.