《对酒》（清）秋瑾

自娱自乐

Thanks for your reply.
Look, yishi, you know I need to rhyme, yes, honestly, I have thought about 'dagger', however...
Another issue is that  '宝刀' doesn't necessarily mean a sword, it could be a knife with all sorts of precious gems or stones embedded in.

海外逸士

sure.   in  some  wuxia novels, a scimitar  could be a  '宝刀'  with all sorts of precious gems or stones embedded in.

青衫来客

Simitar , to my understanding, is a kind of  big curved sword, we say大 弯刀in Chinese. I believe that the treasured sword or blade is accurate enough 。

自娱自乐

宝刀的另一含义是‘锋利的刀’‘快刀’