How to make a sword do knockback?

Hows might I make a sword do some knockback to an AI enemy? I think it has something to do with CFrame but am not to sure, my sword script is this:

local enemies = game.Workspace.Enemies:GetChildren() --// All the children of the enemies folder.


for i, v in pairs(enemies) do
        if v:FindFirstChild("Zombie") then --// If the model has a humanoid
            wait(1)
            v.HumanoidRootPart.Touched:Connect(function()--// When the sword touches the npc
                script.Parent.Activated:Connect(function() --// If you click holding the sword it will damage.
                v.Zombie:TakeDamage(10) --// Npc takes 10 Damage
                wait(1)
            end)
            end)
            end
    end