v. （使）和谐( harmonize的第三人称单数 ); （使…与…）协调; （使）相称; 以和声唱歌或演奏

v go together

v write a harmony for

v sing or play in harmony

v bring (several things) into consonance or relate harmoniously

v bring into consonance or accord

v bring into consonance, harmony, or accord while making music or singing