adjective Etymology: Latin opacus Date: 1641 exhibiting opacity ; blocking the passage of radiant energy and especially light, 2. hard to understand or explain , obtuse , thickheaded , ~ noun ~ly adverb ~ness noun
OPAQUE
Meaning of OPAQUE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012