unbreachable

US

UK

A1 初級
adj.形容詞無法突破的;堅不可摧的
The fortress was considered unbreachable due to its thick walls and strategic location.
adj.形容詞無法違犯的;安全的
The company claimed their network security was unbreachable, but hackers eventually found a vulnerability.
adj.形容詞無法違反的;不可破壞的
The contract was designed to be unbreachable, ensuring that all parties adhered to the terms.