“The ache / toska - No single word in English renders all the shades of toska. At its deepest and most painful, it is a sensation of great spiritual anguish, often without any specific cause. At less morbid levels it is a dull ache of the soul, a longing with nothing to long for, a sick pining, a vague restlessness, mental throes, yearning. In particular cases it may be the desire for somebody of something specific, nostalgia, love-sickness. At the lowest level it grades into ennui, boredom.”—Vladimir Nabokov
“Gloomy Sunday” is a song composed by Hungarian pianist and composer Rezső Seress in 1933, as Vége a világnak (End of the world), with alternate lyrics written by László Jávor. The original lyrics depicted a war-stricken Hungary and a silent prayer to God. Jávor’s lyrics are a mourning to a lost lover and a pledge to commit suicide to meet said lover again in the afterlife.
There have been several urban legends regarding the song over the years, mostly involving it being allegedly connected with various numbers of suicides, and radio networks reacting by purportedly banning the song. One of the suicide is that of Rezső Seress himself, he committed suicide in January 1968 - he survived jumping out of a window, but later in the hospital choked himself to death with a wire.