Capable of burning living tissue; severely sarcastic (adjective)
Looking for the answer to the USA Today Rootonym clue “Capable of burning living tissue; severely sarcastic (adjective)”? The solution is CAUSTIC, a 7-letter word built on the root CAUST (“burn, heat”). It appeared in the June 28, 2026 (Sunday) USA Today Rootonym. See the full puzzle for that day's other words.
Answer
CAUSTIC
CAUST**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”. Browse the full June 28, 2026 Rootonym puzzle for the other three words, or see all Rootonym answers.