Answer: endogenous

AnswerCrossword Clue
ENDOGENOUSOriginating from within
endogenousConfined within a group or society
endogenousHaving an internal cause or origin
endogenousproduced or growing from within
endogenousGrowing or originating from within an organism
endogenousOriginating from within.
endogenous(of a disease or symptom) Not attributable to any external or environmental factor