melancholy
ˈmɛlənkəli/
noun
1.
a feeling of pensive sadness, typically with no obvious cause.
"an air of melancholy surrounded him"
Synonyme:desolation, sadness, pensiveness, woe, sorrow, melancholia;
Nyctophobia is an extreme fear of night or darkness that can cause intense symptoms of anxiety and depression. It generally originates from a traumatic experience in the past.