Different sounds cat's make and why

(http://www.catster.com/lifestyle/cat-behavior-sounds-cats-make-what-they-mean-talking)

The meow

Kittens are much more likely to meow than adults. Since kittens are born unable to hear and see, they make this noise to alert their mother that they need attention. Adult cats rarely meow at each other, but they may meow at us for the same reasons. 

The purr

Cats purr when they’re content, but they also purr as a way to comfort themselves when they’re sick or injured. 

The trill

Cats use a trill, a sound somewhere between a meow and purr, as a friendly greeting.

The growl

The growl is clearly a warning sound. Cats growl at one another to say “Back off before I have to use my claws rather than my voice!”

The chatter

If a cat sits in the window staring at something outside, ears erect and eyes focused, but he can’t get outside to chase them, he may make a chattering noise. This communicates either excitement or frustration.

The hiss

Cats hiss when they’re afraid or angry. The hiss is the next stage of warning after the growl.

The yowl

Female cats in heat make this desperate cry, hoping to attract tomcats to ease their pangs of kitten-making desire. The scream, a variant of the yowl, is the final vocal warning before a serious fight begins.

The burble

This noise is a hybrid between a purr, a meow and a growl. The burble has no negative meaning even though it incorporates a growl.

The wail

I feed my Bella in the bathroom with the door closed, because if I don’t do that, she wolfs down her food and then steals Siouxsie and Thomas’s meals as well. Usually she finishes before the other cats and then starts in with her heart-rending cries of “Pleeeease, let me out!” “Just a minute, Bella,” I reply. Of course, I do let her out once the other cats are finished eating.

Zitao is a reble kitten, even though he's 20, he will be mean and 
a bit evil towards both masters and pets but once he gets to know you,
and that he likes you, he will open up and he his normal cute fun
loving self... he's only like he is at first because he's scared and lonley.