
English word geek comes from British English dialect word geck (fool) which in turn derives from Middle Low German geck (fool, freak)
geck (English)
(archaic, pejorative) Fool; idiot; imbecile. Scorn; derision; contempt (ambitransitive) To jeer; to show contempt for.. To cheat or trick.
geek (English)
(colloquial) A person who is intensely interested in a particular field or hobby and often having limited or nonstandard social skills. Often used with an attributive noun.. (colloquial) An unfashionable or socially undesirable person.. (colloquial) The subculture of geeks; an esoteric subject of interest that is marginal to the social mainstream; the philosophy, events, and physical [...]
geck
Fool, freak