resistant to cutting or chewing | sturdy and strong in constitution or construction; enduring |
physically toughened | having long narrow shallow depressions (as grooves or wrinkles) in the surface |
not given to gentleness or sentimentality | very difficult; severely testing stamina or resolution |
unfortunate or hard to bear | topographically very uneven |
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 | |