I. † incastellate (encastellate) (< m.lat. / it. incastellare) v. tr. arte / arch. mil. / armi 1538 (encastellate). Incastellare (fortificare) (OED).
II. † incastle (< m.lat. / it.) v. tr. arte / arch. mil. / armi 1586 (incastelled). Incastellare (fortificare) (OED).