Antonyms for the phrase "am a party to" can include "uninvolved," "disassociated," or "unrelated." Being a party to something often implies an active role, so the opposite could be "passive observer" or "bystander." Other antonyms could be "ignorant," "outside," "nonparticipant," or "unconnected." These words convey a sense of distance or separateness, indicating that someone is not actively involved in a situation or has no stake in its outcome. Knowing these antonyms can help us express opposite meanings and convey different tones or attitudes in our language.