Batsoreth refers to drought — the absence of rain causing agricultural failure and famine. In the ancient Near East, rain was understood as a divine gift, so its withholding was interpreted as divine displeasure. The word shares a root with batsar (to cut off, restrict), reflecting the restriction of life-giving water.
Drought in Scripture is frequently a covenantal judgment. Leviticus 26 and Deuteronomy 28 list drought among the curses for covenant unfaithfulness. Elijah's three-year drought under Ahab (1 Kings 17-18) was an acted prophecy against Baal worship — Baal was the 'storm god' who supposedly controlled rain. God's sending rain ending the drought at Elijah's prayer (1 Kings 18:41-45) was a direct demonstration that Yahweh, not Baal, is Lord of creation. Drought thus points to the human need for spiritual as well as physical rain — the outpouring of the Spirit (Joel 2:23-28).