Surmise

1. имя существительное [литературно-книжное] догадка, подозрение, предположение Синоним(ы): suspicion 2. глагол [литературно-книжное] предполагать, подозревать, высказывать догадку Синоним(ы): suppose

Большой англо-русский словарь

Surmise

I. noun Etymology: Middle English, allegation, charge, from Anglo-French, from feminine of surmis, past participle of surmettre to place on, suppose, accuse, from Medieval Latin supermittere, from Late Latin, to place on, from Latin super- + mittere to let go, send a thought or idea based on scanty evidence; conjecture II. transitive verb (surmised; surmising) Etymology: Middle English, to allege, from surmise, noun to form a notion of from scanty evidence; imagine, infer

Merriam-Webster's Collegiate Dictionary