extemporaneous
0 antonyms and opposites of extemporaneous, grouped by meaning.
Adj — With inadequate preparation or without advance thought; offhand.
We haven't recorded synonyms for extemporaneous yet. You can still read its full definition, where it comes from, or words that rhyme with it.
Etymology
From Late Latin extemporāneus, from Latin ex tempore (“impromptu”).
Full origin of extemporaneous →