Artificial intelligent assistant

trifallow

ˈtriˌfallow, v. Obs.
  Also 8 try-, tre-; see also thry-fallow.
  [app. altered from the earlier three-, thry-fallow, after twifallow, or under the influence of tri- prefix as in tri-weekly, triennial, etc.]
  trans. To plough (land) a third time in the course of its lying fallow. Also absol.

[1573, 1641: see thry-fallow]. 1610 W. Folkingham Art of Survey i. ii. 43 Orders and seasons for fallowing, twifallowing, trifallowing and seed-furre. 1681 Worlidge Dict. Rust. s.v. Fallow, Thus may you fallow, twifallow, and trifallow; that is once, twice, or thrice plough it before the seed-time. 1707 Mortimer Husb. (1721) I. 53 About the latter end of July or beginning of August, is the time of Try-fallowing, or last plowing before they sow their Rye or Wheat. 1766 Complete Farmer, To Trefallow, to plough land the third time before sowing.

Oxford English Dictionary

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