Reckon (verb) : to think or suppose
From Beloved. (Red book page 311. Paragraph 4)
“Used to be voices all round that place. Quiet, now,” Stamp said. “I been past it a few times and I can’t hear a thing. Chastened, I reckon,…”
Stamp Paid said there used to be voices in the place but now it’s quiet. He reckons (thinks) it had been chastened.
example: Because of the traffic, he couldn’t make it to the meeting, I reckon