Meaning
The pleasure of affliction, the perverse sweetness a devoted heart finds in the hurt dealt by the beloved.
Literally: the relish of torment
How Iqbal uses it
Lazzat-e-aazaar names the lover's relish in the very pain the beloved inflicts, suffering tasted as delight. It belongs to the paradoxical economy of love that Iqbal honours, where torment becomes a treasured proof of attachment.
See it in the verse