When the beloved unties their dark tresses, they turn the lover's morning into evening.

This charming couplet plays on the classic image of the beloved’s dark, cascading tresses. The poet playfully suggests that the moment the beloved unbinds their hair, its shadowy beauty is so vast and intoxicating that it instantly turns the lover's bright morning into twilight. It captures how completely a lover's world revolves around the beloved, where even the opening of hair can change day into night.