English

intranscalent

From in- + transcalent.

Proto-Indo-European *h₁én ‘in’

Proto-Germanic *in ‘into’

English in-

Latin calere ‘to grow warm’

Latin calens ‘being warm or hot, glowing’

Today it means

adj impervious to heat; adiathermic

Language periods are conventional ranges, not dates for this word.

Etymograph / intranscalent