What is Prefix?
{{Unreferenced|date=June 2020}} A '''prefix''' is a part of a word or a word, within a word. It is put at the start of another word to make a different meaning. It can also mean a number that is put in at the start to show which number something is in a group. It is a type of [[affix]]. compound nouns (in other cases also compound adjectives). The following examples illustrate real prefixes. Often people want to use a prefix to mean ''not''. There are many prefixes that mean ''not''. * ''Un''natural means not natural. * ''A''political means not political. * ''Non''violent means not violent. * ''In''direct means not direct We also learnt the prefixes '''''anti''' which means '''against''''' and '''auto''' is used to mean '''''self''''' ''or '''own''''' Some examples of these prefixes: antisocial which means non social anti glare which means it will prevent sun and light glare on a screen autograph which means a person's signature autopilot which means working by itself Other examples of prefixes: * ''bi''centennial (and other number related prefixes: mono, ter/tri, tetra, quadro, penta, hepta, octo, nano etc.) * ''contra''diction * ''en''compass * ''para''trooper * ''per''cent * ''peri''scope * ''proto''type * ''poly''technical * ''re''act * ''semi''colon [[Scientist]]s and [[Medical doctor|doctors]] use prefixes in many words. * ''Hepato-'' is a prefix that means [[liver]]. So ''hepatocellular'' means 'about liver [[cell]]s'. * ''Hydro-'' is a prefix that means [[water]]. So ''Hydroelectric'' [[dam]]s are dams that make [[electricity]] from the flow of water. * ''Pre-'' or ''Ante-'' are prefixes that mean before. Prenatal diagnostics is the [[diagnostic]]s done before the birth of a [[baby]]. * ''Post-'' is a prefix that means after. Post-traumatic experience would be an experience that was made after trauma. Sometimes people make up words by adding a prefix. These words are not in a [[dictionary]]. But if people use these words enough, sometimes they go into dictionaries. For example, we can make