Common Prefixes:
* multi-: meaning "many" or "multiple" (e.g., multilingual, multi-faceted)
* poly-: meaning "many" or "much" (e.g., polygon, polytheism)
* omni-: meaning "all" or "everything," implying many (e.g., omnipresent, omnipotent)
* multitude-: meaning "a large number" (e.g., a multitude of stars)
Less Common but Still Useful:
* pleio-: meaning "more" or "greater" (e.g., pleiotropy)
* pan-: meaning "all" or "everything" (e.g., pandemic, panorama)
* pluri-: meaning "several" or "multiple" (e.g., plurilingual)
The choice of prefix often depends on the specific context and the nuance you want to convey.