A somewhat literary or formal noun for deep, often quiet sadness or pathos, more abstract than everyday words like 悲しみ.
A deep sorrow hangs over his life.
That film depicts human grief.
He has known the sorrows of life since he was young.
I felt a deep sorrow at the sight of the old man.
A sense of sorrow hangs over the story.
哀感 is a literary term for a pervading feeling of sorrow or pathos, very close to 悲哀 but used more for an atmosphere or tone.
悲嘆 emphasizes lamenting or grieving aloud over a loss, while 悲哀 is a quieter, more contemplative sorrow.
悲哀 refers to sorrow or grief itself, whereas ペーソス emphasizes the pathos-evoking quality of a work or scene rather than the raw emotion.
喜び (joy) is the direct opposite of 悲哀 (sorrow) in describing life's emotional extremes.
哀悼 specifically means mourning or condolence for someone's death, while 悲哀 is a general term for sorrow not tied to a death.
A Sino-Japanese compound of 悲 (sad, mournful) and 哀 (sorrow, pity). The exact historical derivation is uncertain, but the combination has been used in literary Japanese to express deep, often philosophical sadness.