Most times over plucked eyebrows do eventually grow back but it can take awhile.
I have over plucked my own eyebrows and thought they would never grow back.
However after 6 months I started noticing the eyebrows growing back and within 1 year the eyebrows grow back fully.
I've known some people who have over plucked their eyebrows and the eyebrows started growing back within 1 month.
It can depend on the person who over plucked their eyebrows but usually they do eventually grow back.
You can help your eyebrows grow back by applying some Vitamin E oil to your eyebrows and the Vitamin E oil will help the eyebrows grow back sooner.
It's not good to constantly pluck your eyebrows because it can also cause an infection.