Other forms: unsubscribed; unsubscribing; unsubscribes
When you cancel an agreement to receive a magazine, newsletter, or streaming service, you unsubscribe. If a political group sends an overwhelming number of emails every week, you should probably unsubscribe.
To subscribe is to sign up for something, from the Latin root subscribere, "sign or write underneath." When you add the prefix un-, "not," you get unsubscribe. If you ever realize you regret subscribing to something, whether it's the local newspaper you never have time to read, or an expensive cake-of-the-month club, you can always decide to unsubscribe!