loneliness
isolation / solitude / desolation
Noun
This term describes a subjective emotional state of distress rather than the objective state of being alone. It carries a heavy emotional weight, implying a painful void or a longing for connection that is not being met. As an uncountable noun, it refers to an abstract quality or feeling. It does not have a plural form and cannot be counted with numbers; instead, it is measured in intensity, such as feeling a great deal of loneliness or a touch of loneliness.