I have teeth but i don't bite. Who Am I ?

What is always in front of you but can’t be seen?

What word is pronounced the same if you take away four of its five letters?

What English word has three consecutive double letters?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

People put me on the table and cut me but do not eat me. What am I?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho