← BackshareGuesscaliginous/kəˈlɪdʒɪnəs/adjectiveDark, misty, or gloomy; hard to see through.A caliginous sky warned of the approaching storm.They walked through the caliginous forest, barely able to see the path ahead.The caliginous fog made driving along the coastal road very dangerous.SynonymsmurkydarkgloomyAntonymsbrightclear