making great mental demands; hard to comprehend or solve or believe
very difficult; severely testing stamina or resolution
someone who learned to fight in the streets rather than being formally trained in the sport of boxing
unfortunate or hard to bear
violent and lawless
physically toughened
an aggressive and violent young criminal
a cruel and brutal fellow
substantially made or constructed
feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')
not given to gentleness or sentimentality
resistant to cutting or chewing
make less strong or intense; soften
not extreme
a person who takes a position in the political center
make more temperate, acceptable, or suitable by adding something else
make less severe or harsh
lessen the intensity of; temper; hold in restraint; hold or keep within limits
preside over
marked by avoidance of extravagance or extremes
being within reasonable or average limits; not excessive or extreme
make less fast or intense
