Swordsmanship is skill in using a sword — how well someone fights with one. It is not the fighting itself but the ability: 'his swordsmanship was excellent' means he handled a sword very well. You meet the word in historical writing, in film reviews, in fencing, and in fantasy stories; it is a slightly formal, literary word, not something you would say about a video game with your friends. Because a sword is now a sport weapon rather than a real one, the word often carries a sense of art and training — technique, discipline, elegance — more than violence. People stretch it a little in praise: a critic might admire an actor's swordsmanship in a film. The -ship ending is doing a job you will see everywhere in English: it turns a person-word into the quality or state of being that person. A swordsman is the person; swordsmanship is what he can do.

劍術、劍法（用劍的本事）