IPA: /ˈbriːtʃər/
KK: /ˈbriːtʃər/
A person or thing that breaks or violates something, often used in the context of security or law enforcement.
The breacher used specialized tools to gain access to the building during the operation.
Breacher → It is formed from "breach" (from Old English "brēcan", meaning to break) and "-er" (meaning a person who). A breacher is a person who breaks through or breaches a barrier.
Think of someone who 'breaks' ('brēcan') through a barrier — that's what a breacher does.