Adjective
unmortared (not comparable)
Not secured by mortar.
The unmortared wall of bricks would be easy to dismantle, merely requiring backs strong enough to lift the bricks and enough time to do it.
The houses were built of unmortared stone, which means that no cement or mortar was used to hold the stones together. Source: Internet
The islanders lived in huts of unmortared stone with mat roofs, and at certain seasons they moved to caves. Source: Internet