alrightyoudaoicibaDictYouDict[alright 词源字典]
frequent spelling of all right, attested from 1893.
There are no such forms as all-right, or allright, or alright, though even the last, if seldom allowed by the compositors to appear in print, is often seen ... in MS. [Fowler]
[alright etymology, alright origin, 英语词源]