"Comperendinate" is not a commonly used word, and some people may struggle with its spelling. The word means to understand fully or to comprehend completely. It is pronounced /kəmˌpɛrɛndɪˈneɪt/ (kum-per-en-duh-nate), with the stress on the second syllable. The word starts with the prefix "com-", which means together or completely. The middle part of the word is "perendinat-", which refers to understanding. Finally, the word ends with the suffix "-ate", which means to become or to make.