1wa·ter·proof 
/ˈwɑ:tɚˌpru:f/ adjective
/ˈwɑ:tɚˌpru:f/ adjective 1 : designed to prevent water from entering or passing through
▪ waterproof boots ▪ The gaskets create a waterproof [=watertight] seal. 2 : designed so that water alone will not remove it
▪ This suntan lotion is waterproof. ▪ waterproof mascara
▪ waterproof boots ▪ The gaskets create a waterproof [=watertight] seal.
▪ This suntan lotion is waterproof. ▪ waterproof mascara
