1.
Water that is ~ is absolutely clear and transparent like glass.
The cliffs, lapped by a crystal-clear sea, remind her of Capri.
ADJ
2.
If you say that a message or statement is ~, you are emphasizing that it is very easy to understand.
The message is ~–if you lose weight, you will have a happier, healthier, better life...
ADJ: usu v-link ADJ emphasis