There are a total of 721 Prefixes that have been compiled and organized in this comprehensive list. The selection includes well-attested Latin, Greek, Old English, numeric, medical, scientific, negational, spatial, and temporal prefixes.

Prefixes are bound morphemes placed before a root to modify its meaning. They range from common, everyday forms (un-, re-, pre-) to specialized scientific and medical forms. Prefixes come from many languages and show regular sound and spelling changes. They are essential for word formation, vocabulary learning, and precise technical naming.

Interesting and little-known facts about Prefixes:
– This compilation lists 721 prefixes, covering common, regional, archaic, and technical forms across disciplines.
– Many widely used English prefixes trace back to Latin or Greek; roughly two-thirds of typical prefix lists come from those languages.
– Numeric prefixes (mono-, di-, tri-, tetra-, penta-, etc.) form the backbone of scientific and taxonomic naming worldwide.
– The negative prefix in- assimilates to forms like im-, il-, and ir- before certain consonants, showing historical sound change in action.
– A few single-letter prefixes occur in technical notation (n-, x-) and chemistry, but most linguistic prefixes are two or more letters.

Below is an alphabetical index linking to A–Z lists of prefixes for quick reference.
Each list includes these data columns: Prefix, Origin, Concise meaning (3–7 words), 2–4 example words, Usage notes/pronunciation, and Source citation/internal link.