godan verb (-su), intransitive verb
to reseat oneself; to correct one's sitting posture
Used when someone shifts or adjusts their seated position, often to sit more properly or comfortably.
彼は椅子に座り直して、話を続けた。
He reseated himself in the chair and continued talking.
正座がきつくなったので、少し
Sitting on my heels became uncomfortable, so I adjusted my sitting position a little.