twelfthly

This term is an ordinal adverb used exclusively for sequencing a long list of points or arguments. It is extremely rare in contemporary English, as most writers switch to phrases like "twelfth" or "the twelfth point" once a list exceeds five or six items to avoid the clunky nature of the suffix.

Because it is an adverb of order, it typically appears at the beginning of a sentence or clause to signal the progression of a structured argument. It carries a highly formal, almost archaic tone and is most frequently encountered in legal documents, old academic treatises, or exhaustive lists.