splate--prophetes.ai

† splate, v. Obs.^—1
[Of obscure origin: cf. splat v.¹ and splaiting vbl. n.]
intr. To extend.

c 1440 Pallad. on Husb. ii. 123 Thy vynys soil be not to molsh or hard,..Ne splate [v.r. splatte] hit not to flat, but sumwhat lene.

Oxford English Dictionary