sur ‧ mise /səˈmaɪz $ sər-/ BrE AmE verb [transitive]
[ Date: 1500-1600 ; Language: Old French ; Origin: past participle of surmetre 'to accuse' , from Latin supermettere 'to throw on' , from mittere 'to send' ]
formal to guess that something is true, using the information you know already
surmise that
When he came in, he didn’t look up, so she surmised that he was in a bad mood.
—surmise noun [uncountable and countable] :
Charles was glad to have his surmise confirmed.