- hypoxia - a very strong drive resulting from a deficiency of available oxygen in the blood and bodily tissues (short of anoxia)
--1 is a kind of drive
--1 is a part of asphyxia
--1 has particulars:anemic hypoxia; hypoxic hypoxia; ischemic hypoxia, stagnant hypoxia; altitude sickness; anoxia; suffocation, asphyxiation