You have a private bow made of insects that's extremely strong. Insect bodies are really durable, so they make for strong bows. You also have to be strong to use it, since it was made just for strong arms.
You had this strong bow made especially for you in きょうと. きょうと is famous for their strong bows, so if you ever want another, you know where to go.
Currently there are no similar looking kanji which exist in the WaniKani learning system