Sacred blue is a literal English equivalent of the French phrase sacrebleu. Specifically, the word combines the adjectives sacre (sacred) and bleu (blue). The phrase nevertheless functions somewhat as a curse which translates more politely as my God! or zounds!.
apathy - an absence of emotion or enthusiasm. 1  feeling - the experiencing of affective and emotional states; she had a feeling of euphoria; he had terrible feelings of guilt; I disliked him and the feeling was mutual.
Apathy refers to the lack of interest that can be seen in a person. Depression, on the other hand, is a psychological condition where a person loses interest in daily activities and feels hopeless. At a glance, apathy and depression look very much alike since both share disinterest/lack of interest as a characteristic.