v. Obs. [app. f. THRIE, THRYE, thrice + FALLOW v., but perh. a later alteration of three-fallow (THREE III. 2) after twy-, TWIFALLOW.] trans. TRIFALLOW.
1573. Tusser, Husb. (1878), 121. Thry fallow I pray thee, Least thistles bewray thee.
1641. Terrier Plesheybury Manor, Essex, Sept. lf. 5 b. The tenaunt to leave 10 acres of land sufficiently fallowed, twyfallowed, thryfallowed.