English
aleprechaunist
From a- + leprechaun + -ist, based on atheist.
Formed from a- + leprechaun + -ist
Proto-Indo-European *uds- ‘up, out’
Proto-Germanic *uz- ‘out-’
Proto-West Germanic *uʀ- ‘up, out, over’
English a-
Today it means
noun A person who does not believe in leprechauns.
Language periods are conventional ranges, not dates for this word.
Etymograph / aleprechaunist