The phrase "choke off" can be replaced with different synonyms depending on the context. For example, in conversation, instead of saying "choke off," one could say "cut off" or "shut down." If discussing a physical obstruction, one might use the terms "block" or "clog." A more formal or technical situation may call for words such as "stifle," "suppress," or "halt." Additionally, if focusing on the struggle to breathe, there are synonyms such as "strangle," "suffocate," or "asphyxiate." In any case, selecting the right synonym for "choke off" depends on the tone and subject matter of the conversation.