Judge incorrectly:
— I had misestimated his determination.

synonym: miscalculate.

Roget 481: misjudge, misestimate, misthink^†, misconjecture^†, misconceive etc. (error) 495; fly in the face of facts; miscalculate, misreckon, miscompute.    overestimate etc. 482; underestimate etc. 483.    prejudge, forejudge; presuppose, presume, prejudicate^†; dogmatize; have a bias etc. n.; have only one idea; jurare in verba magistri [Lat.], run away with the notion; jump to a conclusion, rush to a conclusion, leap to a conclusion, judge hastily, shoot from the hip, jump to conclusions; look only at one side of the shield; view with jaundiced eye, view through distorting spectacles; not see beyond one's nose; dare pondus fumo [Lat.]; get the wrong sow by the ear etc. (blunder) 699.    give a bias, give a twist; bias, warp, twist; prejudice, prepossess.    ... show more

Calculate incorrectly.

synonym: miscalculate.

Dutch: mistellen, verrekenen, vertellen