English
hourlong
From hour + -long.
A compound of hour + -long
Proto-Indo-European *yóh₁r̥ ‘year’
Ancient Greek ὥρᾱ ‘any defined period of time’
Latin hōra
Old French houre
Middle English houre
English hour
Today it means
adj Which lasts an hour, or approximately so.
Language periods are conventional ranges, not dates for this word.
Etymograph / hourlong