What is "tahaan"

Tahaan – A Boy With a Grenade ( Hindi: तहान) is an Indian drama film by Santosh Sivan. The film is based on the life of a young boy and his pet donkey. It is a fable-like journey of the eponymous eight-year-old boy, whose life revolves around the pursuit to find real purpose in his little world. The film stars Purav Bhandare as the young boy. Anupam Kher, Sarika, Rahul Bose, Rahul Khanna and Victor Banerjee form the rest of the cast. It was filmed on location in Jammu and Kashmir.