The clue "Sound of a well-tuned engine" last appeared in the USA Today crossword on November 14, 2017. The correct answer for this puzzle is "PURR", a 4-letter word.
Solution PURR is our most searched for solution by our visitors. Solution PURR is 4 letters long. We have 0 further solutions of the same word length.
There are 2 solutions. The longest is PURR with 4 letters, and the shortest is HUM with 3 letters.
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Solutions are between 3 and 4 letters long.