Re: what could i use to make my eyebrows look thinner?
I'm not really sure if you want to MAKE them brows or thinner (which would require tweezing, waxing, threading etc.) or want to minimize their appearance with makeup? Minimizing them is a bit tricky but you if you have fuller brows you can certainly tame them a bit with a clear brow gel, brow brush and scissors to trim stray or long hairs and even a bit of a matte or sheen finish nude shadow underneath to define them more.
Anastasia brow gel
Tweezerman Brow Shaping Scissors and Brush
Stila Eyeshadow in "dune"