ㄒㄧㄤxiāngㄍㄢgān

  1. 彼此有關紅樓夢·》:聽見不與相干。」文明小史·》:又是道士什麼相干?」干係關連關係相關無干

relevant, to have to do with, coherent (Physics: light etc)​
pertinent, cohérent