transitive (in passive). To be made obstinate; to be caused to persist stubbornly.

transitive. To make more steadfast, unyielding, or obstinate; Military to increase the fighting value of a force by the admixture of soldiers of…

transitive. To confirm (a person) in an evil course, erroneous opinion, etc.; to make (a person's mind, etc.) stubborn or obstinate.

transitive. = obfirm, v.

transitive. To make stubborn; to harden, make firm, render capable of resistance.