Argh the shortest version is an exclamation, of various sorts, usually ironic or humorous in this sense usually written and rarely verbal. More dramatically Aaaaaaaaaargh would be a written scream. Aaaarrrgh there are hundreds of popular different spelling variants typically expresses a scream or cry of ironic or humorous frustration. The OED prefers the spelling Aargh, but obviously the longer the version, then the longer the scream. In this respect it's a very peculiar and unusual word - since it offers such amazing versatility for the user. There are very few words which can be spelled in so many different ways, and it's oddly appropriate that any of the longer variants will inevitably be the very first entry in any dictionary. Spelling of Aaaaarrgghh there's another one.
The young woman who had been driving the team climbed along off the wagon seat after that throwed the lines to individual side. The horses would abide, they'd be glad to. Arrange the same trail the articulated vehicle had took, and a accommodate of a mile back, rode a long lean cowboy. He was hazing upwards of ten head of saddle horses along with him. As he seen the wagon stop he left them to graze and he loped up to where the female was busy unhooking the band. He jumped down after it, unrolled the bed, throwed ago the dusty tarpaulin, and pointing to the bedding he says: This is what you be able to do, Bonnie. Stretch out arrange that and rest up although I unhook the team.