unbreakable

1. ADJ Unbreakable objects cannot be broken, usually because they are made of a very strong material. 不會被打破的

Tableware for outdoor use should ideally be unbreakable. 戶外使用的餐具最好是不容易被打破的。

2. ADJ An unbreakable rule or limit must be obeyed. 必須遵守的

One unbreakable rule in our school is that no child can be tested without written parental permission. 我們學校必須遵守的槼定是：沒有家長的書麪允許不能給孩子做測試。