I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

What is more useful when it is broken?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I make two people out of one. What am I?