TgJ Is36:15 :וְלָא יַרחֵיץ יָתְכוֹן חִזקִיָה עַל מֵימְרָא דַיוי‏ : do not let Hezekiah make you rely upon the word of the Lord
See the entire entry for rḥṣ vb. to trust, to rely

TgJ Is36:15 :שֵיזָבָא יְשֵיזְבִנַנָא יוי‏ : the Lord will surely save us
See the entire entry for šyzb vb. to save