the.com/caustic
Words that don't just sting — they leave a mark on the skin.
means Either a chemical that burns flesh on contact, or a remark sharp enough to do the same to your ego.
from From Greek kaustikos, capable of burning, rooted in kaiein, to burn — the same fire that gave us holocaust and cauterize.
Chemistry termLye is literally called caustic soda.
OpticsA caustic is light focused into bright curves underwater.
Burn familyShares roots with cauldron and cauterize.