1. superlative form of murky; darkest or most gloomy in appearance
2. superlative form of murky; most unclear, obscure, or difficult to understand

Examples

• The murkest part of the swamp was impossible to navigate at night.
• His motives remain the murkest aspect of the entire scandal.
• The water in the pond looked murkest after the storm.
• That was the murkest explanation I've ever heard.
• The murkest corners of the basement had never been explored.