Subscribe means to sign up or agree to receive something regularly. The opposite of subscribing is unsubscribing or canceling the subscription. Unsubscribing means to opt-out from receiving regular updates or services. Another antonym for subscribe is veto, which means to reject or refuse to sign up. Whereas, accepting or approving the subscription would be considered the antonym of veto. Furthermore, decline, deny, and disapprove are some other antonyms for subscribe. These words mean to refuse or turn down the offer of a subscription. So, in summary, the antonyms for subscribe are unsubscribe, veto, decline, deny, disapprove, and reject.