English
erelong
From ere + long.
Proto-Indo-European *dlongʰos ‘long’
Proto-Germanic *langaz ‘long’
Proto-West Germanic *lang ‘long’
Old English lang ‘long, tall, lasting’
Middle English long
English long
Today it means
adv before long, soon.
Language periods are conventional ranges, not dates for this word.
Etymograph / erelong