The prefix that could be used with the word "cept" is "inter".
The prefix "inter" means "between" or "among", and is often used to indicate that something is happening or existing between two or more things. Examples of words that use the prefix "inter" include "interact", "interfere", and "interconnect".
The other prefixes listed, "dis" and "un", generally have negative or opposite meanings, while "all of these" is not a prefix at all.