1(bound form) to decrease; to diminish
2(bound form) to harm; to damage
3(coll.) to ridicule; to deride
4(coll.) mean; nasty; sarcastic
Example
qǐng请bù yào不要zuò做rèn hé任何yǒu有sǔn损sōng松yě野jiā zú家族míng shēng名声de的shì事！
请不要做任何有损松野家族名声的事！
Please don't do anything that would besmirch the Matsuno family name!