Apathy means lack of feeling or emotion.
Apathy is a noun.
Synonyms: passiveness, unconcern, coolness, emotionless, lethargy, numbness, inattention, indifference
Antonyms: emotion, fervor, passion, zeal, excitement, enthusiasm, feeling.
I am disappointed by your apathy towards my failure.
We need a committee with enthusiasm, unlike the apathetic committee we had last semester.
The advertising campaign did little to motivate the apathetic people.