Completely still with no waves and no wind.
The condition of a perfectly flat sea with no waves and no wind.
Physically unable to feel, not having the power of sensation.
Emotionally unable to feel or respond in a normal way.
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).