NEW RIDDLES

What 4 days in the week start with T?

Spelled forwards I'm what you do everyday, Spelled backwards I'm something you hate. What am I?

I am heard before I am seen. Startled and I am alive. I rumble like thunder, yet I pour like rain. I am felt before I arrive; stand with me and you won’t survive. What am I?

When in hot water I get harder. I am only useful once broken. Some people eat only the white part for its low fat, high protein nutritional content. What am I?

I am not visible, tangible, or corrupt. I am genuine, given, and real. It takes three of these to figure out what is left. What am I?

I can be an end to all words but am never spoken. What am I?

I am wasteful, but home to those unwanted. What am I?

I'm from the Old World, and my name from Latin; I can be cured, or served with au gratin. What am I?

What do you call two math friends?

I'm first found in caves, now prolific online; I'm a depiction, a drawing, a symbol, or sign. I'll convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?