Definitions

1. adjective

not leaking or not prone to leaking

“The new container was designed to be unleaky and water-resistant.”

2. adjective

not leaking or losing fluid, especially in a container or vessel

“The engineer worked on making the tank unleaky to prevent any further accidents.”

3. noun

something or someone that is not leaky

“The unleaky pipes in the old house were a pleasant surprise for the new owners.”