Tauheen means disgrace or dishonor (insult)

Here is a couplet from the ghazal Gulshan ki phakat phoolon se nahi” written by Saba Afghani and sung by Jagjit Singh in the link below:

‘Karna hi padega jabt-e-alam peene hi padenge ye aansoon,
fariyaad-o-fugaan se aey naadaan tauheen-e-mohabbat hoti hai

This pain will have to be suffered, these tears will have to be shed
If you complain or make a plea, O naïve one, it will be a disgrace to love