Answer: anaerobic

AnswerCrossword Clue
ANAEROBICCausing an oxygen debt, as exercise
ANAEROBICLacking free oxygen
ANAEROBICKind of bacteria
ANAEROBICLiving in the absence of air
ANAEROBICLiving without oxygen
ANAEROBICLike the bacteria in a septic tank
anaerobicRelating to or denoting exercise that does not improve or is not intended to improve the efficiency of the body's cardiovascular system in absorbing and transporting oxygen
anaerobicRelating to, involving, or requiring an absence of free oxygen
anaerobicliving in the absence of free oxygen also ANAEROBIOTIC