Others
Geist is a component of several German loanwords such as Zeitgeist, the spirit of the time or collective unconscious, and poltergeist, the mischievous ghosts that are believed to make noises.
In Christian theology, the term Heiliger Geist (heilig = holy) is the German translation of Holy Spirit.
Geisteskrank is a German word literally meaning "of an ill mind" and is sometimes used to describe someone suffering from mental illness. In professional psycho-scientific language, however, the term is obsolete nowadays.
Geistlos refers to being mindless or without spirit.
Read more about this topic: Geist