noun
The abstract quality or feeling of being sad; often used in emotional or literary contexts.
彼の歌声には深い悲しさが込められていた。
His singing voice was filled with deep sadness.
別れの悲しさを言葉にできない。
I cannot put the sadness of parting into words.
悲しみ is the more common noun for sadness; 悲しさ emphasizes the quality or degree of sadness, often used in subjective descriptions.
哀れ leans toward pity or wretchedness, while 悲しさ is straightforward sadness.
Derived from the adjective 悲しい (sad) with the nominalizing suffix さ, forming an abstract noun meaning 'sadness'.