not making concessions | resistant to cutting or chewing |
having rugged physical strength; inured to fatigue or hardships | physically toughened |
substantially made or constructed | not given to gentleness or sentimentality |
| unfortunate or hard to bear |
| substantially made or constructed |
| feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') |
| violent and lawless |
| very difficult; severely testing stamina or resolution |
| making great mental demands; hard to comprehend or solve or believe |