What is at the end of a rainbow?

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

It is always ahead of me yet I can never see it. What is it?

It belongs to you, but other people use it more than you do. What is it?

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?

I have eight fingers and two thumbs but I do not live. 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

The more it dries, the wetter it becomes. Can you tell what it is?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?