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

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

I taste better than I can smell. Who am I?

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

What English word has three consecutive double letters?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Which five letter word can be added at the end of below word to form a
valid word?

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A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

I look at you, you look at me, I raise my right, you raise your left. What am I?