expression, ichidan verb
to summer; to go away for the summer
Rare literary expression meaning to leave one's usual residence to spend the summer elsewhere, often to escape the heat. Modern Japanese more commonly uses 避暑する or 夏を過ごす.
昔の貴族は、夏になると涼しい土地へ暑を避けた。
In the past, nobles would go away for the summer to cooler regions.