(Aramaic) from b'a'; a request -- petition.
see HEBREW b'a'
H1159. bau
בָּעוּ (K§ 61, 4) noun feminine petition (ᵑ7 Syriac); — absolute ׳ב Daniel 6:8; suffix בָּעוּתֵהּ 6:14 (both accusative of congnate meaning with verb with בְּעָא).