MULTI- comes from Latin and means "many" or "more than one." MULTIPLY (increase many times), MULTILINGUAL (many languages), MULTITASK (many tasks). MULTI- words are typically 8–12 letters — prime territory for Scrabble bingo plays.
MULTI- comes from Latin multus meaning "many" or "much." It signals plurality beyond two: MULTIPLE = more than one, MULTIPLY = increase by many, MULTILINGUAL = fluent in many languages, MULTIMEDIA = using many types of media, MULTITASK = doing many things at once. Compare MULTI- to BI- (two) and TRI- (three) — MULTI- means "several or many" without specifying an exact number. MULTI- is especially productive in modern technical, business, and academic vocabulary.
MULTI- comes from Latin multus meaning "many" or "much." It signals that something involves several or many elements: MULTIPLE (more than one), MULTILINGUAL (fluent in many languages), MULTIMEDIA (using many media types), MULTITASK (doing many things at once). MULTI- is especially common in modern technical and business vocabulary.
Top MULTI- Scrabble plays: MULTIPLEX (20 pts), MULTIPLY (16 pts), MULTIPLE (14 pts), MULTIFOLD (15 pts). MULTIPLY is the most commonly accessible tournament play. MULTIPLEX scores 20 points and is valid when you can build it from available tiles.
Common MULTI- words: MULTIPLY, MULTIPLE, MULTIPLEX, MULTITUDE, MULTITASK, MULTIMEDIA, MULTICOLOR, MULTILEVEL, MULTILAYER, MULTIBAND, MULTIMODAL, MULTIVERSE, MULTIYEAR, MULTIFAMILY, MULTILINGUAL, MULTICULTURAL. MULTI- is especially productive in technology and business contexts.
Both MULTI- and POLY- mean "many," but MULTI- is from Latin and POLY- is from Greek. MULTILINGUAL and POLYGLOT both mean fluent in many languages. In modern English, MULTI- is more common in technical and business contexts (MULTIMEDIA, MULTITASK, MULTIFAMILY). POLY- is more common in scientific and academic contexts (POLYGON, POLYMER, POLYMATH). Either is correct in many cases — MULTILINGUAL and POLYGLOT both describe the same ability.