"Being out for blood" is a phrase that denotes a strong desire to harm others. Antonyms for this phrase would be found in words that express kindness, empathy, and goodwill towards others. Examples of these antonyms can include "compassionate," "generous," "forgiving," "caring," "sympathetic," "loving," "merciful," and "considerate." Such words indicate a disposition towards nurturing and protecting others, rather than causing harm or pain. When people adopt these traits, they become better equipped to build healthy relationships, foster understanding, and create a harmonious world.