TgJ Is14:1 :וְיִתוֹסְפוּן גִיוֹרִין עְלֵיהוֹן וְיִסתַמכוּן עַל בֵית יַעְקֹב‏ : strangers shall be added to them and join the House of Jacob
See the entire entry for smk vb. to prop up, to support