Fetching details from the dictionary...

to sit (down); to have a seat; to be seated; to kneel (on the floor)
to assume (a position); to take on (a duty); to occupy (a post)
to hold steady; to hold still
ここに据わってください。
Please sit here.
彼は静かに椅子に据わった。
He sat down quietly in the chair.
据わったまま一時間も話し込んでしまった。
I sat there and ended up chatting for a whole hour.