insanity; lack of mental capacity; (state of) non compos mentis
sense of loss; feeling of loss
loss of fighting spirit; losing the will to fight
loss of virginity (of a female); defloration; deflowering
loss of (self-)confidence; inferiority complex
loss of virginity (of a male)
loss of power; power outage; blackout
loss of market; market loss
loss of citizenship; denaturalization; expatriation
language attrition (process of losing a native or first language); linguistic attrition; hypophrasia