这个保温杯号称完全防漏，即使剧烈摇晃也不会滴水。

This thermos is advertised as completely ___leakproof, even when shaken vigorously.

这个保密协议应该是完全防泄漏的，但机密信息还是被泄露了。

The confidentiality agreement was supposed to be ___leakproof, but the classified information still got leaked.