To challenge (someone) or brave (a hazard or opposition).
To refuse to obey.
To not conform to or follow a pattern, set of rules or expectations.
To strive, to labour in difficulty, to fight (for or against), to contend.
To strive, or to make efforts, with a twisting, or with contortions of the body.
A contortion of the body in an attempt to escape or to perform a difficult task.
Strife, contention, great effort.