To acclimate or become acclimated.
To adapt for comfort in extreme climates, especially as regards to temperature.
To cause (a feeling) to be less intense.
To cause to become numb (physically or emotionally).
To cause (the mind, faculties, etc.) to be less acute.
To become numb (especially physically).
Physically unable to feel, not having the power of sensation.
Emotionally unable to feel or respond in a normal way.