Forty is the suitable spelling that the number in all English variants regardless of the reality that four consists of a u. Often world will believe that fourty is a british variant prefer colour but this is also false.
Hello, everyone. We have an announcement. We are pleased/sorry come report the there is never ever a u in forty.
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That"s right: the word for the number 4 is four, yet ten times the is 40, which is assignment forty. This is true in all of the huge English language, regardless of rumors that customers of british English like the word come resemble colour (they don"t), and despite the constant appearances of the misspelling out and about.

There is no great explanation for why forty lacks a u the its near-relation four has. Forty simply is, together American English Spelling writer D.W. Cummings phone call it, one "ill-formed but accepted spelling." that is, however, also a relatively new spelling.
Origins and also Spelling Variants
While the word forty dates back to the language"s earliest incarnation, that had many varied spellings over the centuries, and the current spelling forty days only to the 16th century. The Oxford English Dictionary has a number of spellings the predate the one. From Old English (English together it existed from the 7th century to roughly 1100) there are the following:
féowertig
féowurtig
feuortig
But things really got going in center English—English together it existed between the 12th and also 15th centuries. In texts from that period the OED notes the adhering to spellings:
fowwerrtig
feortig
feowerti (and fowerti)
feouwerti
feuwerti (and fuwerti)
fuerti
feowrti
fourte
fourti
vourti
vourty
forti
fourty
faurty
fourth
fourthy
Modern English carried us other options:
fourtie
fourtye
fortie
forty
vorty
The winner, the course, is forty, nearly the last of the bunch. The logical middle English relic fourty, hiding most of the way down that long list, lasted till the 18th century, once for reasons unknown it fell out that use. Occasionally that"s just exactly how it goes in English.
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References:
D.W. Cummings, American English Spelling (Baltimore and London: The Johns Hopkins college Press, 1988), pgs. 28, 31.