What did unoka die of?

Unoka, a character in Chinua Achebe's novel "Things Fall Apart," died of an unknown illness, which is suggested to be related to a failure to provide for his family and a lack of success in his life. His death reflects his struggles with debt and social status, contributing to his sense of shame. Additionally, it is implied that his weak physical constitution may have played a role in his demise, as he was not a strong or resilient man.