Inna Narpathu (Tamil: இன்னா நாற்பது, romanized: Iṉṉā Nāṟpatu, lit.
'The Forty Undesirable Things') is a Tamil poetic work of didactic nature belonging to the Eighteen Lesser Texts (Pathinenkilkanakku) anthology of Tamil literature.
[1] Inna Narpathu is a collection of 40 poems describing the most undesirable things one should avoid.
Inna Narpathu includes four categories of harmful things one should avoid: a beautiful but disloyal wife, the wealth of a miser, a life under a tyrant, beauty of a flower without fragrance.
Inna Narpathu, together with Iniyavai Narpathu spells out in simple and succinct terms moral codes essential for daily life of the individual and for the society.