The clue "Carbon ___" last appeared in the The Washington Post Sunday crossword on June 21, 2020. The correct answer for this puzzle is "DIOXIDE", a 7-letter word.
Solution DIOXIDE is our most searched for solution by our visitors. Solution DIOXIDE is 7 letters long. We have 0 further solutions of the same word length.
There are 10 solutions. The longest is DIOXIDE with 7 letters, and the shortest is AGE with 3 letters.
Indeed, the puzzle clue "CARBON ___" has seen a surge in lookups recently (last checked: 16 Feb 2026). Apparently it´s giving players some headaches!
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Solutions are between 3 and 7 letters long.