أَكْرَمَنِي زَيْدٌ.
Meaning: Zayd honoured me.
Parsing: akrama is a past verb; nūn protects the verb before -ī; the -ī pronoun is the accusative direct object; Zayd is the nominative subject.
أَكْرَمَهُ زَيْدٌ.
Meaning: Zayd honoured him.
The suffix -hu is the attached object pronoun in the accusative position.