Hard

1 (of a substance etc.) firm and solid. 2 a difficult to understand, explain. or accomplish. b (foll. by to + infin.) not easy to (hard to please). 3 difficult to bear (a hard life). 4 unfeeling; severely critical. 5 (of a season or the weather) severe. 6 unpleasant to the senses, harsh (hard colours). 7 a strenuous, enthusiastic, intense (a hard worker). b severe, uncompromising (a hard bargain). c Polit. extreme; most radical (the hard right). 8 a (of liquor) strongly alcoholic. b (of drugs) potent and addictive. c (of pornography) highly obscene. 9 (of water) containing mineral salts that make lathering difficult. 10 established; not disputable (hardjacts).