not having or expressing strong feelings, often when this is surprising or a bad thing

Investigators said the couple seemed oddly unemotional about the disappearance. 调查人员说，这对夫妇似乎对失踪事件态度漠然。

They described him as cold and unemotional. 他们形容他冷酷无情。

not allowing strong feelings to influence your decisions

He was rational and unemotional in his response. 他的反应很理性，没有感情用事。