English

hypopyrexia

From hypo- + pyrexia.

Proto-Indo-European *upó ‘under, below’

Ancient Greek ὑπό ‘under’

English hypo-

Proto-Indo-European *péh₂wr̥ ‘fire’

…

Ancient Greek πῦρ ‘fire’

Ancient Greek πυρετός ‘fever’

Ancient Greek πυρεξία ‘feverishness’

Latin pyrexia

Today it means

noun An unusually low body temperature

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

Etymograph / hypopyrexia