apathy
● Lethargy
● Coolness
● Stoicism
● Unresponsiveness
● Stolidity
● Disinterest
● Dispassion
● Dullness
● Passiveness
● Stolidness
● Insensibility
● Listlessness
● Detachment
● Heedlessness
● Indifference
● Aloofness
● Coldness
● Unconcern
● Disregard
● Lassitude
● Phlegm
● Incuriosity
● Incuriousness
● Insensibleness
● Uninterest
● Emotionlessness
● Passivity
● Insensitivity
● Insouciance
● Regard
● Concern
● Sympathy
● Caring
● Interest
● Liveliness
● Compassion
● Halfheartedness
● Was
● Dabble
● Half
● Heart
● Hearts
● Lukewarm
● Play
● Tepid
● Tepidly