English
equinal
From equine + -al.
Formed from equine + -al
Proto-Indo-European *h₁eḱ-
…
Proto-Indo-European *h₁éḱwos ‘stallion, horse’
Proto-Italic *ekwos ‘horse’
Latin equus ‘horse’
Latin equīnus ‘of or pertaining to horses’
English equine
Today it means
adj equine
Language periods are conventional ranges, not dates for this word.
Etymograph / equinal