Vouch is our word of the day. If you vouch for someone, it means you give your personal guarantee that the person is good or honest or skilled.
Imagine you’re looking for a new babysitter, you might ask friends if they have a babysitter they can vouch for, meaning from their experience, they can assure you the person is capable, caring, and good with kids.
Or sometimes it’s easier to get a job at a new company if there’s someone already working there who knows you and who can vouch for you – so they can tell the boss you’re knowledgeable and a hard worker.