Verb

A Transitive  Verb requires an object to complete its meaning.
Examples : --

a. The hunter killed a bear.
b. The scholar learned his lesson.

In ( a ) " bear " is the object of " killed ".
In ( b ) " lesson " is the object of " learned ".

Transitive Verb has two voice : --
a  The Active voice
b. The Passive voice
Note : - An Intransitive verb from its nature cannot have voices.