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sub-zero
01
having below zero degrees Celsius or Fahrenheit
Example
Residents of the northern regions endure sub-zero temperatures for months during the winter.
The Antarctic winter brings sub-zero temperatures that challenge even the most prepared researchers.
The freezer keeps food at sub-zero temperatures to preserve freshness.
The mountain climber faced sub-zero wind chills while ascending the peak.
Arctic animals are adapted to survive in sub-zero environments year-round.
