ломаться

Verb

 * 1)  to break, to break up, to fracture, to split
 * 2)  to break down (of a device, etc.)
 * 3)  to collapse, to fall apart
 * 4) to crack, to break (of the voice)
 * 5)  to pose, to mince, to pretend
 * 6)  to be obstinate, to cause difficulties, to refuse to agree
 * 1)  to be obstinate, to cause difficulties, to refuse to agree
 * 1)  to be obstinate, to cause difficulties, to refuse to agree

Usage notes
The perfective refers to one single complete act, while abstract  refers to a complete stretch of either multiple acts or a continuous act.