imaginement--prophetes.ai

† iˈmaginement Obs. rare^—1.
  In 5 ym-.
  [f. imagine v. + -ment. Cf. OF. ymaginement image.]
  Contrivance, subtlety.

c 1470 Harding Chron. cxx. v, Some in his sherte put oft tyme venemyng..Some in his hose, by great ymagenement.

Oxford English Dictionary