(Aramaic) from b'esh; wicked -- bad.
see HEBREW b'esh
H873. bish
[בִּאישׁ K§ 11, 8b)] adjective bad (so Egyptian Aramaic Cooke75. 2; בִּישׁ ᵑ7, Syriac ); — feminine singular emphatic וּבִאישְׁתָּא Ezra 4:12 rebellious and bad city (not בִּאוּשְׁתָָּא, see Baern.).
בָּתַר בָּאתַר, see אֲתַר.