- Eye dialect spelling of certain.
1841, Various, Punch, Or The London Charivari, Vol. 1, July 17, 1841:
- If the marrow in one's backbone should melt, it would be sartin to run out at the tip of one's tail.
1895, Frederick Marryat, Peter Simple and The Three Cutters, Vol. 1-2:
- "Why do you say so?" replied I. "Because I think, nay, I may say that I'm sartin, we'll have a hurricane afore morning."
1910, Edward Marshall and Charles T. Dazey, In Old Kentucky:
- This here's a mountain fireplace, sartin sure.