Answer: apnoeal

AnswerCrossword Clue
apnoealtemporary suspension of breathing, occurring in some newborns (infant apnea) and in some adults during sleep (sleep apnea)
apnoealpertaining to apnea (temporary cessation of breathing, also APNOEA)
apnoealthe extreme condition caused by lack of oxygen and excess of carbon dioxide in the blood, produced by interference with respiration or insufficient oxygen in the air; suffocation