to be the most difficult part of a process so that once you have completed this part, you have almost succeeded.
When you're training a dog, getting it to trust you is half the battle.
(redirected from be half the battle)
be half the battle (won)
To represent the completion of a significant task in the process to achieve a certain goal or outcome. If we can get the CEO to approve of our plan, that will be half the battle won.Digging the car out of the driveway will be half the battle of getting out to the store.