TgO Gen11:4 :וְרֵישֵיה מָטֵי עַד צֵית שְמַיָא‏ : with its top reaching the edge of heaven
See the entire entry for mṭy vb. to come, to reach

TgO Gen11:4 :הַבוּ נִבנֵי לַנָא קַרתָא וֻמַגדְלָא וְרֵישֵיה מָטֵי עַד צֵית שְמַיָא‏ : let us build ourselves a city and a tower with its top reaching up to the sky
See the entire entry for ˁaḏ ṣēṯ prep. towards

TgO Gen11:4 :וְרֵישֵיה מָטֵי עַד צֵית שְמַיָא‏ : with its (the Tower of Babel's) top reaching the edge of heaven
See the entire entry for rēš, rēšā n.m. head; top; chief