Refreshing already given advice here but, plucking is a wonderful thing. But it's a course that once you set yourself on it, you must go forward with, and maintain, you don't want eyebrow growth all over your eye area.. that's the "giveaway".
The idea that I followed was that gradual change would be less noticed. Pluck the peripheal areas, where the strays are outside of a very broad outline of what you think your brow shape will be...
Start moving in closer to the final shape you want over time, but making sure you are keeping the new growing hairs in the areas already plucked, plucked!
One key that I found to feminine eyebrows, or at least for my face, is to shape from the bottom side of the eyebrow. Be conservative on plucking the tops, as that is where you can keep bushiness if you need to, or let grow for fuller eyebrows, while still keeping a shape by plucking the lower parts.
Another tip, for the top of the eyebrows, once you have the bottom shape you like (from plucking) , is to push the brow hairs upward, and lightly and *carefully* run a hair trimmer over the top to trim the longer ones, and when you push them all back down, makes for a lighter brow, without the plucking.
Back to the point, I found that gradual change helped make brow change unnoticeable as I began reducing them, and to those that I knew before , and that new people I met, really didnt notice either that my brow was a bit feminine. People really don't care, from what I've found. Just keep the new growths plucked that are outside the brow area, that's the giveaway.
*huggs*,
Melan