emotionless
adj. B2 Upper Intermediate UK //ɪmˈəʊʃənləs// emo·tion·less
adj. showing no feelings or having no feelings at all. You use this to describe someone who looks very calm or cold.
adj. lacking or showing no emotion; characterized by a total absence of feeling or expression. Often used to describe a person's demeanor or a machine's response.
The actor gave an emotionless performance that felt very real.
Despite the bad news, she remained emotionless and continued her work as if nothing had happened.
The robot's emotionless voice was designed to provide clear, objective data without the distraction of human inflection or sentiment.