The Hebrew word ababuot refers to blisters or boils that bubble up on the skin. It is used specifically in the context of the sixth plague of Egypt — the plague of boils.
The sixth plague struck Egypt with boils breaking out on people and animals (Exodus 9:9–11). Notably, even Pharaoh's magicians could not stand before Moses because of their boils — those who had replicated earlier plagues were now themselves struck down, unable to resist. This plague prefigures God's final judgment in Revelation 16:2, where foul and grievous sores break out on those who bear the mark of the beast. Physical affliction becomes a sign of spiritual rebellion.