1. 应受斥责的;应该谴责的
If you think that a type of behaviour or an idea is very bad and morally wrong, you can say that it is reprehensible .

1. bringing or deserving severe rebuke or censure

e.g. a criminal waste of talent
a deplorable act of violence
adultery is as reprehensible for a husband as for a wife

Synonym: condemnablecriminaldeplorablevicious