Ruthlessly acquisitive or competitive. Describes a business or other set of circumstances where people try to succeed at the expense of other people.
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.