noun
apathy; indifference; listlessness
General lack of emotion or interest; can describe a person's state or an atmosphere.
彼は無感情な顔でその知らせを聞いた。
He listened to the news with an apathetic expression.
無感情な態度が周囲を不安にさせた。
His indifferent attitude made those around him uneasy.
noun
athymia
Medical term for a loss or absence of emotion; used in psychiatric contexts.
無感情は、統合失調症の陰性症状の一つとして知られている。
Athymia is known as one of the negative symptoms of schizophrenia.
無気力 refers to a lack of energy or motivation, whereas 無感情 is about the absence of emotional expression or feeling.
Compound of 無 (mu, 'without') and 感情 (kanjō, 'emotion').