ずに

ずに attaches to the negative form of a verb to express doing something without carrying out the stated action. It emphasizes that the action was deliberately not performed, often leading to a different outcome or consequence. It is commonly used to describe situations where someone acts or reacts without performing a certain routine or expectation, or to contrast with what would normally be done. In many contexts, ずに is slightly more formal or written than 〜ないで, and it can sound natural in narratives or explanations.