The Collaborative International Dictionary
Surmise \Sur*mise"\, v. t. [imp. & p. p. Surmised; p. pr. & vb. n. Surmising.] To imagine without certain knowledge; to infer on slight grounds; to suppose, conjecture, or suspect; to guess.
It wafted nearer yet, and then she knew
That what before she but surmised, was true.
--Dryden.
This change was not wrought by altering the form or
position of the earth, as was surmised by a very
learned man, but by dissolving it.
--Woodward.
Surmising \Sur*mis"ing\, a. & n. from Surmise, v.
Wiktionary
n. The act of making surmises. vb. (present participle of surmise English)
Usage examples of "surmising".
Which report believing—and 'twas indeed most true—and calling to mind that in a few days the term that he had asked of his wife would be fulfilled, and surmising that there could be no tidings of him at Pavia, Messer Torello made no question but that the lady was provided with another husband.
However, he still kept quiet, save that, perceiving the monks in flight, and surmising the reason, he began to call the abbot by name, bidding him be of good courage, for that he was his nephew, Torello.