Notice, there is no oval ( º ) over the "a." Baba means open; båba means bad.
Baba i bentåna. Open the window.
Baba i korason-mo. Open your heart.
Ti siña ma baba. It can't be opened.
Kao esta ma baba i tenda? Is the store opened already?
Babaye. To open for.
Babaye yo' ni petta! Open the door for me!
There is a Communion hymn, rarely sung nowadays, that goes :
I pettan i sagrårio, påle' babaye ham! Na' huyong i Saina-ta yan nå'e ham!
(Open to us, Father, the door of the tabernacle! Take our Lord out and give Him to us!)
Just to throw this in : how do you say "can opener" in Chamorro?
"Abrelåta" or "baban låta." The latter uses the native word "baba," the former is from the Spanish.