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English prefixes are affixes (i.e., bound morphemes that provide lexical meaning) that are added before either simple roots or complex bases (or operands) consisting of (a) a root and other affixes, (b) multiple roots, or (c) multiple roots and other affixes. Examples of these follow:
Adding a prefix to the beginning of an English word changes it to a different word. For example, when the prefix un-is added to the word happy, it creates the word unhappy. The word prefix is itself made up of the stem fix (meaning "attach", in this case), and the prefix pre-(meaning "before"), both of which are derived from Latin roots.
Meaning Origin language and etymology Example(s) -iasis: condition, formation, or presence of Latin -iasis, pathological condition or process; from Greek ἴασις (íasis), cure, repair, mend mydriasis: iatr(o)-of or pertaining to medicine or a physician (uncommon as a prefix but common as a suffix; see -iatry)
The following is an alphabetical list of Greek and Latin roots, stems, and prefixes commonly used in the English language from P to Z. See also the lists from A to G and from H to O . Some of those used in medicine and medical technology are not listed here but instead in the entry for List of medical roots, suffixes and prefixes .
The English language uses many Greek and Latin roots, stems, and prefixes. These roots are listed alphabetically on three pages: Greek and Latin roots from A to G; Greek and Latin roots from H to O; Greek and Latin roots from P to Z. Some of those used in medicine and medical technology are listed in the List of medical roots, suffixes and ...
Prefix meaning "under" or "lower". From Gr. hypo. [192] hypothallus. protothallus. 1. (Of lichens) The first growth of the hyphae, before differentiation has taken place. Usually of a crustaceous lichen's earliest stage, lacking a cortex and photobiont. Often persists as a colored layer on the bottom of the later stages of maturation. 2.
NYR-NBD, meaning Need Your Response - Next Business Day. Meaning requires a response before the end of the next working day. OoO, meaning Out of Office. Used in corporate emails to indicate that the sender will not be at work. PFA, meaning Please Find Attached / Attachment. Used in corporate emails to indicate that a document or set of ...
Most prepositions are simple bases consisting of a single morpheme, like in, from, and under. Historically, however, English prepositions have been formed from the prefixes a- and be- . [ 18 ] : 190–191 This a - prefix originally contributed the meaning "on" or "onto" but is no longer productive ; that is, it is no longer used to form new words.