harmonize

vt. & vi.

1. (使)和谐, (使…与…)协调, (使)相称
   • The colours do not seem to harmonize (with each other) at all.
     这些颜色显得一点也不协调。
2. 以和声唱歌或演奏
   • The singing teacher taught them to harmonize the new song.
     音乐教师教他们用和声演唱这首新歌。