Agarbatti (अगरबत्ती) is an Indian English term for incense stick.
Synonyms would include: Incense Stick, Joss Stick, Simpoi Sticks, etc.
Incense sticks are wooden sticks typically rolled with an aromatic paste.
These are then lit and allowed to burn to release the fragrance.
Agarbatti Definition From Dictionary.Cambridge.Org
A thin wooden stick covered in a substance that is burned to produce a pleasant smell, especially as part of a religious ceremony.