the word 'ultima' is a direct borrowing from latin, where 'ultima' is the feminine form of the adjective 'ultimus', meaning 'last'. in latin grammatical terminology, 'syllaba ultima' referred to 'the last syllable'. english adopted the term in the 16th century, dropping 'syllaba' and using 'ultima' alone as a noun to specifically denote the final syllable of a word. its logic is transparent, building directly on the latin root for 'last' with a nominalizing suffix. the journey from the proto-indo-european root al- (meaning 'beyond'), which gave rise to latin 'ultra' ('beyond') and its superlative form 'ultimus' ('farthest, last'), illustrates a clear path from a spatial concept to a sequential one in linguistic description.

Structure: ultim (last) + a (noun suffix) - ultim: from latin 'ultimus', meaning 'last, final, farthest'. serves as the root conveying the core meaning of 'last'. - a: a latin feminine singular noun suffix, often used to form abstract nouns or to mark the nominative case. in this word, it functions to form a noun from the adjective root.