בָּעֵ֣ת הַהִ֔יא עלה [עָל֗וּ] עַבְדֵ֛י נְבֻכַדְנֶאצַּ֥ר מֶֽלֶךְ־בָּבֶ֖ל יְרוּשָׁלִָ֑ם וַתָּבֹ֥א הָעִ֖יר בַּמָּצֽוֹר׃
Zu dieser Zeit kamen die Diener Nebukadnezars, des Königs von Babylon, nach Jerusalem, und die Stadt wurde belagert.
Metzudat David on II Kings
they built ramparts around it to conquer it, just like it appears in the verse Deuteronomy 20:20 "and you shall build fortifications..." and it is called 'matzor' because it besieges and distresses the nation that is in it.