loneliness

1. N-UNCOUNT Loneliness is the unhappiness that is felt by someone because they do not have any friends or do not have anyone to talk to. 孤獨

I have so many friends, but deep down, underneath, I have a fear of loneliness. 我有這麽多朋友，但是內心深処我還是有一種對孤獨的恐懼。