characterized by courtesy and gracious good manners; "if a man be gracious and courteous to strangers it shows he is a citizen of the world"-Francis Bacon
exhibiting courtesy and politeness; "a nice gesture"
not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "a difficult child"; "found himself in a difficult situation"; "why is it so hard for you to keep a secret?"
requiring much effort and trouble; "the mountain climb was long, steep, and difficult"