1. in a way that is difficult to understand or unclear
2. in a way that blocks light or prevents seeing through

Examples

• The professor explained the concept so opaquely that no one understood.
• The contract was written opaquely to hide important details.
• She spoke opaquely about her plans for the future.
• The fog hung opaquely over the harbor.
• The glass was painted opaquely to block the view.
• His motives remained opaquely hidden from his colleagues.