miscalculate

Universal Words verb 1 to estimate an amount, a figure, a measurement, etc. wrongly: [VN] They had seriously miscalculated the effect of inflation. * [Vwh-] He had miscalculated how long the trip would take. [also V] 2 to judge a situation wrongly: [VN] She miscalculated the level of opposition to her proposals. [also Vwh-, V] miscalculation noun [C,U]: to make a miscalculation * a grave miscalculation of the mood of the country