Ymb-tyrnan

According to the Old English Dictionary:

(1)

ymb-tyrnan

to turn round :-- Feówer and twéntig tída beóð ágáne, ǽr ðan ðe heó beó ǽne ymbtyrnd, Lchdm. iii. 254, 15. (2) to surround :-- Mid wæter ymbtyrnd stede circumlutus locus, Wrt. Voc. i. 59, 15. ymb-tyrnan