How do you spell Surmise

Available Definitions:
1)  n. - A thought, imagination, or conjecture, which is based upon feeble or scanty evidence; suspicion; guess; as, the surmisses of jealousy or of envy.
2)  n. - Reflection; thought.
3)  v. t. - To imagine without certain knowledge; to infer on slight grounds; to suppose, conjecture, or suspect; to guess.