English
hyperstable
From hyper- + stable.
Proto-Indo-European *úp
Proto-Indo-European *upér ‘over, above’
Proto-Hellenic *hupér
Ancient Greek ὑπέρ ‘over’
English hyper-
Proto-Indo-European *steh₂- ‘to stand’
…
Proto-Italic *staðlom ‘place’
Latin stabulum ‘stable, dwelling’
Anglo-Norman estable ‘stable’
Middle English stable ‘stable (building)’
English stable
Today it means
adj Unusually stable
Language periods are conventional ranges, not dates for this word.
Etymograph / hyperstable