To urge a person; to press on; to incite to action or motion via intrinsic motivation.
To drive forward; to propel an object, to provide an impetus for motion or action.
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.