Fold-swop

According to the Old English Dictionary:

fold-swop

Substitute: feld-wóp, es; m. A peewit (?) :-- Felduuóp, felduóp bradigabo, Txts. 44, 131. Feldwuóp, Wrt. Voc. ii. 11, 45. Feldwóp bradigatio, ploratio campi, 127, 16. [Cf. O. L. Ger. feld-hoppo bradigabo: widu-hoppo upupa.] fold-swop