1. dark; gloomy; murky
いきなり、暗い廊下の先から、女性の声が響いた。Suddenly, a woman's voice echoed from the end of the dark hallway.
2. depressed; dispirited; down in the dumps; dark (mood)
そういえば、昨日からずっと暗い顔をしていた気がする。Come to think of it, I feel like you've been looking down ever since yesterday.
3. dark (in colour); dull
4. ill-boding; dark (e.g. past); suspicious
5. unlikely (to succeed); hopeless; unpromising
6. unfamiliar (with); ignorant (of)
as 〜に暗い