The phrase "was oblivious to" means to be unaware of something. Synonyms for this phrase include clueless, blind, ignorant, and unconcerned. Someone who is clueless is completely unaware of something. Being blind refers to not having knowledge or understanding of what is happening. Ignorant means not knowing or being aware of something important. And someone who is unconcerned does not care or bother about anything. These synonyms for "was oblivious to" are useful when someone is not paying attention to a situation or is deliberately ignoring it. Such words allow people to convey a message without using the same phrase repeatedly.