to stay, remain, keep oneself
Se quiser se manter saudável, deve fazer mais exercícios.
If you want to stay healthy, you should exercise more.
Os homens devem se manter longe da cozinha.
Men should stay away from the kitchen.
Tom era incapaz de se manter num emprego e de viver sozinho.
Tom was unable to hold down a job and live alone.
O equilíbrio iria se manter durante séculos.
The balance would remain for centuries.
— Guardiões da Noite (2004)