worm. Put by Figure of speech Synecdoche (of the Part), App-6, for. blight of such; as in Deuteronomy 28:39. They were appointed during the night, and came at sunrise.
Related Commentaries of Jonah 4:7
Jonah 4:7
7 But God prepared a worm when the morning rose the next day, and it smote the gourd that it withered.