Trikāṇḍī
Trikāṇḍī ("Three books") is a Sanskrit treatise on the philosophy of language and grammar (vyakarana), written by the 5th-century Indian grammarian and philosopher Bhartṛhari. Some 19th-20th century printed editions refer to it by the title Vākyapadiya, which is actually the title of a part of it. Bhartṛhari's work is significant for its comprehensive treatment of the relationship between language, thought, and reality.