Webster's Revised Unabridged Dictionary · 1913

Murky

Murky , adjective

[Old English mirke, merke, Anglo-Saxon myrce, mirce; akin to Icelandic myrkr, Danish & Swedish mork.]

1.
Dark; gloomy.
The murkiest den. — Shakespeare
A murky deep lowering o'er our heads. — Addison
2.
Obscured by haze or mist; clouded; turbid; as, poor visibility in the murky water.