The only such secret is the location of her iyi-uwa which she shares with everybody. There is no other explicit secret told within the book.
Ezinma shares with her mother, Ekwefi, the secret name given to her by the priestess of the Oracle, Agbala. This secret name reveals Ezinma's fate and destiny, as it is believed to hold powerful insight into a person's future.
Ezinma was Nwoye's half sister. Both of them share the father of Okonkwo, but Ezinma's mother is Ekwefi; Nwoye's mother is Okonkwo's first wife.
The answer is a secret. You can have a secret, but if you share it, it is no longer secret.
Ezinma is the child who is most able to understand Okonkwo's view points and what he wishes for their family. She seems to share Okonkwo's desire for family honour and is willing to sacrifice for it as well.
A secret.
a secret
secret
A secret.
A secret
its a secret
It's secret
Not necessarily. You could only share some of it, or maybe share it in such a way as to retain ownership.
a secret