also: かぜあな
General term for an opening that lets air or wind pass through, such as a ventilation hole or a natural fissure.
We made an air hole in the wall to improve ventilation.
There was a small windhole deep inside the cave.
deep cave with cold wind
Specific geological term for a deep cave from which cold wind blows, often due to temperature differences; also read ふうけつ in this sense.
See also: 風穴 (ふうけつ)
Caves called 'wind caves' are scattered throughout this region.
There was a vent hole open in the wall.
Cold wind blows continuously out of the wind cave all year round.