Can i make my thin eyebrows thicker naturally?

You can't. I know I tried. When I was about 12 I was cooking dinner with a gas stove and took a few seconds too long to light it. It blew up in my face and blew off my eyebrows and singed my bangs. I tried several things to make them grow thicker and nothing ever worked. I eyebrows are very light blonde and I have to pencil them in to even look like I have them. Frankly, I have given up worrying about them.