bajasteis
Bajasteis is a Spanish verb conjugation. Specifically, it is the second-person plural preterite indicative form of the verb bajar. The verb bajar generally means "to go down," "to lower," "to decrease," or "to download." Therefore, "bajasteis" translates to "you all went down," "you all lowered," "you all decreased," or "you all downloaded," depending on the context in which it is used.
The preterite indicative tense in Spanish is used to describe actions that were completed in the past.
For example, "Vosotros bajasteis las escaleras" means "You all went down the stairs" (informal plural in Spain).