personality flaw; behavior flaw.
main = primary or most obvious flaw = a weakness He was a satisfactory leader, but his main flaw was a weakness for women.
The flaw in Antigone that the chorus pointed out to her in Scene 4, line 45 was her lack of respect for human laws. This flaw would lead to her death, and the chorus blamed Antigone for her own demise.
shortcoming means flaw
As big an error as it was for imaging, the actual flaw was only about the thickness of a human hair.
The original P85 had a design flaw which had the potential to result in an accidental discharge. The Mk II corrected this design flaw.
Tragic flaw; excessive pride
According to Aristotle, the tragic flaw, or "hamartia," is a character trait in a tragic hero that leads to their downfall. This flaw is often hubris, or excessive pride, which causes the hero to ignore warnings or make fatal mistakes. Aristotle believed that the audience should feel pity and fear for the hero as they suffer the consequences of their flaw.
I assume you mean violate, and you can't. Unless there's a flaw in the "law".
A flaw is an imperfection. Sometimes scientists are concerned with such things as the flaws in the crystalline structure of a mineral. That would mean that the pattern of the crystal has some deviation at some location, the atoms don't line up.
claw flaw
software that has bugs ... flaw mean fault or bug. (By Shaz Alive)