The clue "Extreme effort" last appeared in the Universal crossword on March 11, 2016. The correct answer for this puzzle is "RIGOR", a 5-letter word.
Solution RIGOR is 5 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is RIGOR with 5 letters, and the shortest is RIGOR with 5 letters.
Not at the moment. Currently trending: Cunning, Serious, flourishing, Molar and Quiet.
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The solution is 5 letters long.