guesstimate
noun [ C ] informal (also guestimate) uk/ˈɡes.tə.mət/ us/ˈɡes.tə.mət/
大概估计，粗略估算
an approximate calculation of the size or amount of something when you do not know all the facts
Current guesstimates are that the company's turnover will increase by six percent this year. 按照目前的大致估测，这家公司的营业额今年会增长6%。