When Okonkwo's wives bring hime his food for the evening, Ezinma sits with her father while she waits for hime to finish her mother's dish. Why does Okonkwo yell at her?

As readers we understand that Okonkwo is actually looking for a reason to be angry with the women of his household. His impotence is on display: first, because he feels emasculated by what he perceives to be the feminine nature of the party; and second, he can only show his dominance over the women by his anger.