TgJ Amos1:10 :וַאֲשַלַח אִישָתָא בְשוּרֵי צוֹר וֻתשֵיצֵי בִירָניָתַהָא‏ : I shall let fire loose against the walls of Tyre and it will destroy its residential compounds
See the entire entry for byrnh n.f. citadel