noun

1. an idea or opinion formed from evidence that is neither positive nor conclusive; conjecture; guess
2. the act or process of surmising; conjecture in general

Etymology: ME surmyse < OFr surmise, accusation, fem. of surmis, pp. of surmettre, lit., to put upon, hence to accuse < sur- (see sur-) + mettre, to put < L mittere, to send (see mission)

transitive verb, intransitive verb surmised -·mised′, surmising -·mis′·ing