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Capable of burning living tissue; severely sarcastic (adjective)

MEMaya EllisonPuzzle Editor · Verified answers

USA Today Rootonym clue · 7 letters · last seen June 28, 2026

Answer
CAUSTIC
CAUSTIC · 7 letters · puzzle shows CAUST**
The Root
CAUSTmeans “burn, heat”

In a sentence: The manufacturer indicated a warning on the can regarding CAUSTIC properties of the product.

About this clue

The Rootonym clue “Capable of burning living tissue; severely sarcastic (adjective)” has the answer CAUSTIC (7 letters), built on the root CAUST, which means “burn, heat”. See the full June 28, 2026 Rootonym puzzle for the other three words, or browse all Rootonym answers.