difficultness
n.困难,难度:事物的复杂性、棘手程度或难以理解、解决的特点。
例句
Five-Step Routine is small, coherent, moderate in difficultness, easy to learn, and is the primary practice of learning Wushu routines.
五步拳短小精悍,连贯紧凑,难度适中,简单易学,是学习和掌握武术套路的入门练习。