There are several synonyms for the phrase "let pass." One of the most common synonyms is "overlook." When you overlook something, you consciously choose not to focus on it or pay attention to it. It can also mean to choose not to comment on or take action against it. Another synonym for "let pass" is "neglect." Neglecting something means failing to give it the attention or care it deserves or requires. Similarly, "ignore" can be used to describe the act of allowing something to pass without addressing it. "Disregard" is another synonym for "let pass," meaning to pay no attention to something or someone.