English
subfreezing
From sub- + freezing.
Proto-Indo-European *upó ‘up; from below’
Proto-Italic *supo ‘under’
Latin sub ‘under, beneath, below’
English sub-
Today it means
adj Colder than the freezing point of water; below zero degrees Celsius or 32 degrees Fahrenheit.
Language periods are conventional ranges, not dates for this word.
Etymograph / subfreezing