mtsowlah (Hebrew #4688)
also mtsuwlah {mets-oo-law'}; or mtsulah {mets-oo-law'}; from the same as 6683; a deep place (of water or mud)
KJV usage: bottom, deep, depth.
Pronounce: mets-o-law'
Origin: or mtsolah {mets-o-law'}