What's the origin of this word?Is it indo-european?
It seems to be unknown. Here's Beekes on the family of σκεῦος (which includes σκευή):
Chantraine has nothing useful to add (for once).
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Good answer! You might also add that skeyē is just skeyos with a feminine noun ending added. – Draconis Feb 16 '19 at 22:10