steeled russian

• закаля́ться

  to toughen up, to harden oneself, to build up one's resistance

  to be tempered, to be steeled, to grow tougher

  to be tempered, to be hardened, to be quenched

• закаля́вшийся

  hardened, tempered, steeled, seasoned

Examples

• Он мужался перед трудной операцией.

  He steeled himself before the difficult operation.

• Закалявший волю труд не прошёл даром.

  The work that had steeled his resolve was not in vain.