sense of loss; feeling of loss
Refers to the emotional experience of having lost something or someone important, often used in psychological or everyday contexts.
After retiring, he was overcome by a strong sense of loss.
The feeling of loss after losing my pet was greater than I had imagined.
Compound of 喪失 (loss) and 感 (feeling, sense). The exact historical derivation is uncertain, but the word is a straightforward modern combination.