apathy — You can use apathy to talk about someone's state of mind if you are criticizing them because they do not seem to be interested in or enthusiastic about anything.
calm — A calm person does not show or feel any worry, anger, or excitement.
calmness — without rough motion; still or nearly still: a calm sea.
depression — A depression is a time when there is very little economic activity, which causes a lot of unemployment and poverty.
idleness — the quality, state, or condition of being lazy, inactive, or idle: His lack of interest in the larger world and his consummate idleness were the causes of their dreadful divorce.