Transparent

Adjective:
1. Transmitting light; able to be seen through with clarity
2. So thin as to transmit light
3. Free of deceit
4. Easily understood or seen through (because of a lack of subtlety)

Usage:
1. Transparent crystal
2. Transparent chiffon
3. A transparent explanation
4. A transparent lie

Synonyms:
1. Cobwebby
2. Crystal Clear
3. Crystalline
4. Diaphanous
5. Filmy
6. Gauze-Like
7. Gauzy
8. Gossamer
9. Guileless
10. Limpid
11. Lucid
12. Pellucid
13. See-Through
14. Sheer
15. Vaporous
16. Vapory