guesswork /ˈgɛsˌwɚk/ noun Learner's definition of GUESSWORK
[noncount]
: the act or process of finding an answer by guessing猜想；猜测 -
This book takes the guesswork out of buying a home. [=it gives you the information you need so that you can be sure about what to do]本书是购房指南。
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Calculating the drug's long-term effects is pure guesswork.对药物的长期效果进行的计算纯属猜测。