Twiflldan

According to the Old English Dictionary:

twiflldan

p. de To double :-- Ic twyfylde (-fealde, MSS. J. O. T. : -felde, MS. D.) duplico, Ælfc. Gr. 24; Zup. 138, 12: 49; Zup. 287, 4. Twyfeldende mæssehacelan duplicans casulam, Anglia xiii. 406, 587. [Cf. O. H. Ger. zwifaltōn geminare: Icel. tvīfalda.] twiflldan