Prefixes
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"Un–" is used to indicate negation, as Newspeak has no non-political antonyms. For example, the standard English words warm and hot are replaced by uncold, and the moral concept communicated with the word bad is expressed as ungood. When appended to a verb, the prefix "un–" communicates a negative imperative mood, thus, the Newspeak word unproceed means "do not proceed" in Standard English.
"Plus–" is an intensifier that replaces very and more; thus, plusgood replaced very good and English words such as great.
"Doubleplus–" is an intensifier that replaces extremely and superlatives; to that purpose, the Newspeak word doubleplusgood replaced words such as fantastic and excellent.
"Ante–" is the prefix that replaces before; thus antefilling replaces the English phrase "before filling."
"Post–" is the prefix that replaces after.
Suffixes
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In spoken and written Newspeak, suffixes are also used in the elimination of irregular conjugations:
"–ful" transforms any word into an adjective, e.g. the English words fast, quick, and rapid are replaced by speedful and slow is replaced by unspeedful.
"–d" and "–ed" form the past tense of a verb, e.g. ran becomes runned, stole becomes stealed, drove becomes drived, thought becomes thinked, and drank becomes drinked.
"–er" forms the more comparison of an adjective, e.g. better becomes gooder.
"–est" forms the most comparison of an adjective, e.g. best becomes goodest.
"–s" and "–es" transform a noun into its plural form, e.g. men becomes mans, oxen becomes oxes, and lives becomes lifes.
"–wise" transforms any word into an adverb by eliminating all English adverbs not already ending in "–wise", e.g. quickly becomes speedwise, slowly becomes unspeedwise, carefully becomes carewise, and words like fully, completely, and totally become fullwise.
Therefore, the Oldspeak sentence "He ran extremely quickly" would become "He runned doubleplusspeedwise".