Kāfūr is the Arabic word for camphor in English and kāpūr in Hindi, all possibly stemming from the same origins. It means to vanish or disappear.
Here is a line from the song “Main Faraar Sa” from the Indian romantic comedy film Running Shaadi, produced by Shoojit Sircar, and released in Feb 2017.
Tu hai to har kami, kāfūr ho gayi, mutthi mein dhool thi, sindoor ho gayi
If you are with me, everything I was lacking has disappeared
I had dust in my fist, it turned to the holy vermillion (symbolic of marriage)
Here is the video to the entire song –
urduwallahs 