Anhydrous and Unmoistened

Anhydrous adjective - Without water; especially without water of crystallization.

Unmoistened and anhydrous are semantically related In some cases you can use "Unmoistened" instead an adjective "Anhydrous".

Anhydrous and unmoistened are semantically related in dry topic. You can use "Anhydrous" instead an adjective "Unmoistened", if it concerns topics such as moistureless.