From his silence, I could infer that he disagreed with the decision.

infer 是动词，意思是"推断、推论"，指根据已知的事实或迹象得出某种结论。这个词来自拉丁语 inferre（带入、带来），由前缀 in-（向内）和 ferre（携带）组成，字面意思是"带入结论"。