The dictionaries I’ve consulted indicate that both “straitjacket” and “straightjacket” are now accepted spellings. That said, it appears that it “straitjacket” may have been the original spelling, but that the more common spelling now is “straightjacket.”
The dictionaries I’ve consulted indicate that both “straitjacket” and “straightjacket” are now accepted spellings. That said, it appears that it “straitjacket” may have been the original spelling, but that the more common spelling now is “straightjacket.”