Opaque
 

o·paque   [oh-peyk] Show IPA adjective, noun, verb, o·paqued, o·paqu·ing.
adjective
1.
not transparent or translucent; impenetrable to light; not allowing light to pass through.
2.
not transmitting radiation, sound, heat, etc.
3.
not shining or bright; dark; dull.
4.
hard to understand; not clear or lucid; obscure: The problem remains opaque despite explanations.
5.
dull, stupid, or unintelligent.

Apply Pressure while the Irons Hot.