English
thermostable
From thermo- + stable.
A compound of thermo- + stable
Proto-Indo-European *gʷʰer- ‘to be warm’
Proto-Indo-European *gʷʰermos
Proto-Hellenic *kʷʰermós
Ancient Greek θερμός ‘warm, hot’
English thermo-
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 Physically or chemically unaffected by high temperatures
Language periods are conventional ranges, not dates for this word.
Etymograph / thermostable