Sentence:  Lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from the LORD our God, to go and serve the gods of these nations; lest there should be among you a root that beareth <WSD>gall</WSD> and wormwood; 
Meaning of the word marked with <WSD> tags:  Great misery or physical suffering, likened to the bitterest-tasting of substances.