breach
US /briːtʃ/
UK /briːtʃ/

1.
an act of breaking or failing to observe a law, agreement, or code of conduct
:
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The company was sued for breach of contract.
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His actions constituted a serious breach of trust.
1.
to break a law, agreement, or code of conduct
:
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He breached the terms of his probation.
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The hackers breached the company's security system.
2.
to make a gap in and break through (a wall, barrier, or defense)
:
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The floodwaters breached the levee.
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The whale breached the surface of the water.