The antonyms for the phrase "refuse admittance" can be broadly categorized into two sections- positive antonyms and negative antonyms. Positive antonyms are the words that indicate permission or approval to enter, whereas negative antonyms refer to denying access or forbidding entry. Some common positive antonyms for "refuse admittance" can be granting permission, allowing access, welcoming entry, or giving clearance. On the other hand, negative antonyms can be phrases such as denied entrance, prohibited entry, barred access, or blocked admittance. Overall, antonyms for "refuse admittance" elaborate on the permission and denial aspects of access to a particular place or event.