"Draw blood" is a common idiom used to describe actions that result in significant harm or injury, either physically or emotionally. Some synonyms for this phrase include "inflict pain", "cause harm", "wound deeply", and "hurt deeply". These expressions convey the same intensity and gravity that "draw blood" does, and are a good substitute for people who may find the phrase too graphic or aggressive. "Draw blood" is often used in the context of sports, martial arts, or combat, but can be applicable in any situation where there is potential for injury or harm. Knowing alternative expressions for this phrase can help us communicate more effectively and accurately.