What word does this rebus represent?

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It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

How can you tell a raw egg from a hard-boiled egg?

If a wheel has 54 spokes, how many spaces are there between the spokes?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

What number when divided in half becomes zero?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What is the Surname of Barbie Doll?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?