The word "more codicillary" is not a commonly used term, but it refers to something related to a codicil, which is an amendment or addition to a legal document such as a will. The spelling of "codicillary" is /kɒdɪsələri/, with the stress on the second syllable. It is derived from the word "codicil" (/kɒdɪsəl/), which comes from the Latin "codicillus," meaning a small book or writing tablet. The prefix "more" simply means "additional" or "extra."