To take part in a campaign.
Consistently ride in races for a racing season.
The period during which a blast furnace is continuously in operation.
A series of operations undertaken to achieve a set goal.
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.