悲怆 is a literary and formal term that describes a profound, overwhelming sorrow — the kind of tragic sadness you feel in a heartrending scene or a solemn piece of music. It can be used as a predicate (e.g. 情景悲怆 'the scene is tragic') or as an attribute (e.g. 悲怆的旋律 'a mournful melody'). You'll often encounter it in classical literature, news reports of disasters, or emotional music titles like 悲怆奏鸣曲 (the Pathetique Sonata).