opaque

Từ điển American Heritage Dictionary 4th

o·paque (ō-pākʹ)adj.
1.
a. Impenetrable by light; neither transparent nor translucent.
b. Not reflecting light; having no luster:
an opaque finish.
2. Impenetrable by a form of radiant energy other than visible light:
a chemical solution opaque to x-rays.
3.
a. So obscure as to be unintelligible: “opaque, elusive, minimal meanings” (John Simon).
b. Obtuse of mind; dense. See Synonyms at dark.n.
Something that is opaque, especially an opaque pigment used to darken parts of a photographic print or negative. [Middle English opake, shady, and French opaque, opaque (from Old French, shady), both from Latin opācus.] o·paqueʹly adv.o·paqueʹness n.