burn·out 
/ˈbɚnˌaʊt/ noun
plural burn·outs /ˈbɚnˌaʊt/ noun 1 a [noncount] : the condition of someone who has become very physically and emotionally tired after doing a difficult job for a long time
▪ Teaching can be very stressful, and many teachers eventually suffer/experience burnout. ▪ the burnout rate among teachers
b [count] : a person who suffers burnout
▪ a novel about academic burnouts — see also burned out, burn out 4 at 1burn 2 [noncount] : the time when a jet or rocket engine stops working because there is no more fuel available
▪ Teaching can be very stressful, and many teachers eventually suffer/experience burnout. ▪ the burnout rate among teachers
b [count] : a person who suffers burnout
▪ a novel about academic burnouts — see also burned out, burn out 4 at 1burn
