subiréis
-you will go up
The word subiréis is the future form of subir in the second person plural.
See the full subir conjugation

subir

Niños, ¿subiréis las bolsas de la abuela arriba, por favor?
Boys, will you bring your grandma's bags upstairs, please?
No os contentéis con menos; y subiréis, victoriosos, al podio de la eternidad.
May they never be content with less, and they will victoriously mount the podium of eternity.
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