The Collaborative International Dictionary
Trifallowed
Trifallow \Tri"fal`low\, v. t. [imp. & p. p. Trifallowed; p.
pr. & vb. n. Trifallowing.] [Pref. tri- + fallow. Cf.
Thryfallow.]
To plow the third time before sowing, as land.
--Mortimer.
Wiktionary
trifallowed
vb. (en-past of: trifallow)