the word 'yucca' entered english in the mid-16th century, borrowed directly from spanish. the spanish term itself was adopted from a native carib language, likely taíno, where it referred specifically to the cassava plant (manihot esculenta). due to early botanical confusion between the cassava plant and the unrelated desert plant we now call yucca, the name was misapplied and became fixed in english for the latter. this is a classic example of a loanword whose form and meaning were shaped by colonial-era cultural and scientific exchange, rather than by the compounding of classical roots.

the word is a simplex loanword. it does not contain separable morphemes within modern english spelling.