Yes, barest is a Scrabble word!

Adjective

1. Completely unclothed

2. Lacking in amplitude or quantity

3. Not having a protective covering

4. Lacking its natural or customary covering

5. Just barely adequate or within a lower limit

6. Apart from anything else; without additions or modifications

7. Lacking a surface finish such as paint

8. Providing no shelter or sustenance

9. Having everything extraneous removed including contents

10. Lacking embellishment or ornamentation