English
tail eventtail event
From tail + event.
Formed from tail + event
Proto-Indo-European *deḱ- ‘to tear, fray, shred’
…
Proto-Germanic *taglą ‘hair, fiber’
Proto-West Germanic *tagl
Old English tæġel
Middle English tail
English tail
Proto-Indo-European *gʷem- ‘to come’
…
Latin veniō ‘come’
Latin ēveniō ‘to happen’
Latin ēventus ‘an event’
Middle French event
English event
Today it means
noun an event associated with a given infinite sequence Y=y_k|k>k_0 that is determined by any subsequence of the form Y_n=y_k|k>n,n>k_0 (a "tail" of that sequence)
Language periods are conventional ranges, not dates for this word.
Etymograph / tail event
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