unresponsive; showing no reaction
Describes a person or thing that does not react or respond to stimuli, questions, or events. Often used in medical, psychological, or everyday contexts.
患者は呼びかけに無反応だった。
The patient was unresponsive to being called.
彼は私の冗談に無反応で、少し寂しかった。
He showed no reaction to my joke, and I felt a bit lonely.
He showed no reaction to her calling out to him.
He pretended to show no reaction to the news.
The patient became unresponsive to the medication.