To bring things into harmony, or to make things compatible.
To provide parts to.
To provide the harmony for a melody.
To be in harmonious agreement.
To play or sing in harmony.
To strive, or to make efforts, with a twisting, or with contortions of the body.
To strive, to labour in difficulty, to fight (for or against), to contend.
A contortion of the body in an attempt to escape or to perform a difficult task.
Strife, contention, great effort.