ESV: then the Lord will bring on you and your offspring extraordinary afflictions, afflictions severe and lasting, and sicknesses grievous and lasting.
NIV: the Lord will send fearful plagues on you and your descendants, harsh and prolonged disasters, and severe and lingering illnesses.
NASB: then the Lord will bring extraordinary plagues on you and your descendants, severe and lasting plagues, and miserable and chronic sicknesses.
CSB: he will bring wondrous plagues on you and your descendants, severe and lasting plagues, and terrible and chronic sicknesses.
NLT: then the Lord will overwhelm you and your children with indescribable plagues. These plagues will be intense and without relief, making you miserable and unbearably sick.
KJV: Then the Lord will make thy plagues wonderful, and the plagues of thy seed, even great plagues, and of long continuance, and sore sicknesses, and of long continuance.
NKJV: then the Lord will bring upon you and your descendants extraordinary plagues—great and prolonged plagues—and serious and prolonged sicknesses.