the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail"
the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
indulging in or influenced by fancy; "a fanciful mind"; "all the notional vagaries of childhood"
having a curiously intricate quality; "a fanciful pattern with intertwined vines and flowers"
not based on fact; dubious; "the falsehood about some fanciful secret treaties"- F.D.Roosevelt; "a small child's imaginary friends"; "her imagined fame"; "to create a notional world for oneself"