imponderable
Word family nounimponderabilityimponderablesadverbimponderablyadjectiveimponderableimponderous
im·pon·der·a·ble /ɪmˈpɒndərəbəl $ -ˈpɑːn-/ noun [countableC usually plural] formal JUDGEsomething that cannot be exactly measured, judged, or calculated 无法精确估量的事物;难以判断的事物 There are too many imponderables to make an accurate prediction. 有太多无法判断的因素,因此很难作出准确的预测。
—imponderable adjectiveadj an imponderable question 难以判断的问题