designado
/desiɡˈnado/ · B2 · noun · m
frailty
🗳️ designado = de- + signado: the one signed/marked to take over the role
Designado comes from Latin designare, to mark out or appoint. The designado is the person marked out in advance to act in someone's place, so a stand-in or vice. Link it to English designate, which is the same word.