TOUGH
—adjective. 1 hard to break, cut, tear, or chew. 2 able to endure hardship; hardy. 3 unyielding, stubborn, difficult (it was a tough job). 4 colloq. A acting sternly; hard (get tough with). B (of circumstances, luck, etc.) Severe, hard. 5 colloq. Criminal or violent. —none. Tough person, esp. A ruffian. ? toughen verb. Toughness none. [old english]