רֹ֤עוּ עַמִּים֙ וָחֹ֔תּוּ וְהַֽאֲזִ֔ינוּ כֹּ֖ל מֶרְחַקֵּי־אָ֑רֶץ הִתְאַזְּר֣וּ וָחֹ֔תּוּ הִֽתְאַזְּר֖וּ וָחֹֽתּוּ׃
ליאַרעמט, איר פֿעלקער, אָבער איר װעט צעבראָכן װערן; יאָ, פֿאַרנעמט אַלע װײַטענישן פֿון דער ערד; גורט אײַך אָן, אָבער איר װעט צעבראָכן װערן, גורט אײַך אָן, אָבער איר װעט צעבראָכן װערן.
Rashi
Join together Heb. (רֹעוּ), an expression similar to (Prov. 27:10): “Your friend and your father’s friend (רֵעֲךָ וְרֵעַ אָבִיךָ), as Jonathan renders: Join together. Join together, armies of Sennacherib.
Ibn Ezra
רעו Break.17A.V., Associate yourselves.—According to I.E. the meaning of the verse is: Prepare yourselves to destroy nations; the next verse continues: It will all be in vain. Comp. תרועם thou shalt break them (Ps. 2:9.) רׂעוּ as well as חׂתּוּ are imperatives; like סׂבּוּ surround (Ps. 48:13).
Rashi
Gird yourselves and be broken You may gird yourselves with all sorts of might, but, eventually, you shall be broken.