COUNTERBORE v. 3 definitions
To form a counterbore in, by boring, turning, or drilling; to enlarge, as a hole, by means of a counterbore.
COUNTERCHANGE v. 3 definitions
To checker; to diversify, as in heraldic counterchanging. See Counterchaged, a., 2. With-elms, that counterchange the floor Of this flat lawn with dusk and bright. Tennyson.
COUNTERCHANGED a. 2 definitions
hanged mutually; thus, if the field is divided palewise, or and azure, and cross is borne counterchanged, that part of the cross which comes on the azure side will be or, and that on the or side will be azure.