Intensive from bots; a swamp -- fen, mire(-ry place).
see HEBREW bots
H1207. bitstsah
בִּצָּה noun feminine swamp, Job 8:11 as place where rushes grow, compare 40:21; בִּצּאֹתָ֯ו (Co ובצותיו) plural suffix Ezekiel 47:11 ("" וּגְבָאָיו).