praedurare Save DMLBS praedurare [CL] , to make very hard; b to harden at the tip (cf. CL praeferratus). crystallus est lapis ex aqua ~atus, ideoque a glacie nomen sortitus Alb. Lond. DG 8. 10. b cujus multo calibe ~atos sentis aculeos Map NC IV 3 f. 47.