bringing or deserving severe rebuke or censure; "a criminal waste of talent"; "a deplorable act of violence"; "adultery is as reprehensible for a husband as for a wife"
If you think that a type of behaviour or an idea is very bad and morally wrong, you can say that it is reprehensible. Mr Cramer said the violence by anti-government protestors was reprehensible. reprehensible behaviour is very bad and deserves criticism