(of glass, liquid, etc. 玻璃、液体等 not clear enough to see through or allow light through 不透明的；不透光的；浑浊的 opaque glass 不透明的玻璃 opaque tights 不透明的连裤袜
Extra ExamplesAs the lens becomes more opaque, the patient notices a reduction in vision. 随着晶状体变得更加不透明，患者会注意到视力下降。 The windows were nearly opaque with grime. 窗户满是污垢，几乎不透光。 These crystals are completely opaque and nearly black. 这些水晶一点儿也不透明，几乎是黑的。
Oxford Collocations Dictionaryverbs- be
- look
- become
- …
- completely
- almost
- nearly
- …
- with
(of speech or writing 说话或写作 difficult to understand; not clear 难懂；模糊；隐晦；不清楚 Extra ExamplesBoth question and answer are rather opaque. 问题和答案都相当晦涩难懂。 The complex administrative arrangements mean that the decision-making process remains somewhat opaque. 复杂的行政安排意味着决策过程依然有些不透明。 The system is completely opaque to non-specialists. 在非专业人士看来，该系统完全无法理解。
Oxford Collocations Dictionaryverbs- be
- become
- remain
- …
- extremely
- fairly
- very
- …
opposite transparent
Word Originlate Middle English opake, from Latin opacus ‘darkened’. The current spelling (rare before the 19th cent.) has been influenced by the French form.