Subfreezing (adjective)

Beneath or below the freezing point.

Origin:

From the latin word 'sub' meaning 'under' and 'freezing' meaning 'the temperature at which a substance freezes'.

Examples:

1. The subfreezing temperatures made it too dangerous to go outside.
2. It was a subfreezing day, and the lake had frozen over completely.
3. The subfreezing windchill made it feel even colder.
4. The subfreezing temperatures had caused the pipes to freeze and burst.
5. Due to the subfreezing temperatures, the winter festival was cancelled.