unconcern (n.)
- acedia
- aloofness
- apathy
- ataraxia
- blah
- blahs
- boredom
- carelessness
- casualness
- comatoseness
- detachment
- disinterest
- disinterestedness
- dispassion
- disregard
- dullness
- easygoingness
- heartlessness
- hebetude
- heedlessness
- hopelessness
- impassiveness
- impassivity
- inattention
- indifference
- insouciance
- lassitude
- lethargy
- listlessness
- mindlessness
- negligence
- nonchalance
- numbness
- passiveness
- passivity
- phlegm
- recklessness
- resignation
- sloth
- sluggishness
- sopor
- spiritlessness
- stolidity
- stupefaction
- stupor
- torpidity
- torpidness
- torpor
- unmindfulness
- withdrawal
- withdrawnness
