unconcern

1. The trait of remaining calm and seeming not to care;
   A casual lack of concern (synset 104680827)
   is a type of: carefreeness - the trait of being without worry or responsibility
   same as: indifference, nonchalance
2. A feeling of lack of concern (synset 107520777)
   is a type of: feeling - the experiencing of affective and emotional states
   subtypes:

   • indifference - unbiased impartial unconcern
   • coldheartedness, hardheartedness, heartlessness - an absence of concern for the welfare of others

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