hugger mugger (adjective) cloak-and-dagger: full of secrecy
Sinonime: cellophane,
clear, crystal-clear, crystalline,
diaphanous, filmy, gauzy, glassy,
gossamer, hyaline, limpid, lucent, lucid, pellucid, permeable, plain,
sheer, thin, tiffany, translucent, transpicuous, vitreous
Antonime: blocked,
cloudy,
dark,
opaque