watertight

IPA: wˈɔtɝtaɪt

So tightly made that water cannot enter or escape.
(figurative) So devised or planned as to be impossible to defeat, evade or nullify.

Examples of "watertight" in Sentences

So it's watertight at the bottom.
Protection and watertight subdivision.
There was a watertight lockbox on the plane.
If it is watertight, it is a well posed problem.
The process will never be absolutely watertight.
IMHO this is not a logically watertight argument.
The dura was then closed in a watertight fashion.
Modern day watertight compartments are indeed watertight.
A partially watertight bulkhead is located in the forecastle.
The bulkhead bowed in but retained watertight protection of the ship's interior.