The fourty spelling dies out quickly in the 1600s, and I am convinced by the guess in Why is 'forty' spelled without a 'u' in Canadian/British English? : the King James Bible happened to choose forty instead of fourty, at a time of orthographic whimsy and/or phonetic instability. And that was that.
Because that is how it is pronounced. Blame grammar nitvits for breaking their own rules.
This post was edited by JakobA the unAmerican. at December 24, 2017 6:55 AM MST
Because you are the only one here who can pronounce it. Show off. LOL I suppose we could go WAY back to the past and just say "ug".
This post was edited by Element 99 at December 24, 2017 6:57 AM MST