לשוח. לְשׁוֹן תְּפִלָּה (בראשית רבה), כְּמוֹ יִשְׁפֹּךְ שִׂיחוֹ (תהילים ק"ב):

לשוח TO MEDITATE — this means “to pray” (Genesis Rabbah 60:14), as we find (Psalms 102:1) “[A prayer of the afflicted …] when he poureth forth his plaint.