ψῦχος

John 18:18 ψῦχος cold

Because it was cold, the servants and officers were standing around a charcoal fire they had made to keep warm. And Peter was also standing with them, warming himself.

Acts 28:2 ψῦχος. cold.

The islanders showed us extraordinary kindness. They kindled a fire and welcomed all of us because it was raining and cold.

Here: Cold weather or chill. These people had just swum or floated ashore in soaked clothes in late autumn, so they were at real risk from the cold. The word appears elsewhere in the NT at John 18:18 (another fire, another cold night) and 2 Cor 11:27.

2 Corinthians 11:27 ψύχει cold

in labor and toil and often without sleep, in hunger and thirst and often without food, in cold and exposure.

Here: Physical cold, as in the night by the fire in John 18:18 or the cold on Malta in Acts 28:2.