Yerushalmi Ta'anis, 3:5: "Dever" is where, in town of five hundred residents, three people die in the space of three days - which we learn from the fact that the Torah uses the word "Yadbek", and it is the way of women to stick three loaves together when baking (on Erev Shabbos). ¹

Rashi, Targum Onkelos and Targum Yonasan: "Shachefes," is a swelling of the flesh, "Kadachas" is fever, ¹ and "Dalekes", inflammation ..

Rashi: It is an internal heating of the body (which produces heart-ache and) which leaves the person constantly thirsty.

Targum Yonasan: it is heartache that is caused by constant dread.

Rashi: "Shidafon" is corn that is parched by the east-wind' and "Yerakon", corn that has dried and turned straw-yellow.