Tansul, from the root n-s-l, concerns slipping out, being drawn out, or coming apart. In the structure fa-sullī ... tansul, the latter verb conveys the consequence of pulling the garments apart.
The audible final kasrah also belongs to the lām-rhyme of the poem. Endings such as al-tadallul, yafʿal, tansul, and muqattal belong to the same sound pattern and should not be isolated from poetic performance.
Rhyme does more than repeat a sound: it links disparate meanings—coyness, obedience, parting, and a wounded heart—through an audible structural unity.