Adam Clarke on Numbers 34:6

Ye shall even have the great sea for a border - The Mediterranean Sea, called here the Great Sea, to distinguish it from the Dead Sea, the Sea of Tiberias, etc., which were only a sort of lakes. In Hebrew there is properly but one term, ים yam, which is applied to all collections of water apparently stagnant, and which is generally translated sea. The Greek of the New Testament follows the Hebrew, and employs, in general, the word θαλασσα, Sea, whether it speaks of the Mediterranean, or of the sea or lake of Galilee.