I Have Been Plucking My Eyebrows for 2 Years and They Are Thin.

Will the eyebrow hairs come back if I stop plucking them?

Plucking the eyebrows will eventually produce traction alopecia of the eyebrow. This means that the hairs that are constantly plucked will die off. If they are now dead, they will not grow back even if you stop plucking.