single word requests - Is there an idiom available, that is exactly opposite to "Cake walk" or "Child's play"?



Is there an idiom available, that is exactly opposite to "Cake walk" or "Child's play"? I am looking for something exactly synonymous with "Very difficult" or "strenuous".


Example Sentence:



This task is really _______(difficult).





Comments

Popular posts from this blog

etymology - Since when has "a hot minute" meant a long time?

etymology - Origin of "s--t eating grin"

usage - "there doesn't seem" vs. "there don't seem"

First floor vs ground floor, usage origin

meaning - What is synonyme of "scale"?

punctuation - Is "et al" always accompanied by a period?

grammatical number - "My wide range of abilities have/has helped"