opaqueKK [oˈpek] ｜ /oʊˈpeɪk/
GEPT 中高級
C2adjective
impenetrable to sight; not transmitting or reflecting light or radiant energy
The thick fog made it nearly impossible to see through the opaque air.
不透明的；不透光的
C2adjective
difficult to understand or explain; not clear or lucid in thought or expression
The professor's lecture on advanced quantum physics was so opaque that even the brightest students struggled to comprehend it.
晦澀難懂的；不清楚的