[no obj.][usu. with clause]suppose that something is true without having evidence to confirm it 猜想;臆测 he surmised that something must be wrong. 他猜想肯定有什么地方不对劲儿。 [with direct speech]‘I don't think they're locals,’ she surmised. “我想他们不是本地人,”她推测说。
noun
a supposition that something may be true, even though there is no evidence to confirm it 猜想;推测 Charles was glad to have his surmise confirmed. 查尔斯很高兴他的推测得到了证实。 [mass noun]all these observations remain surmise. 所有这些评论都仍然只是猜想。
语源
late Middle English (in the senses 'formal allegation' and 'allege formally'): from Anglo-Norman French and Old French surmise, feminine past participle of surmettre 'accuse', from late Latin supermittere 'put in afterwards', from super- 'over' + mittere 'send'