One of the mysteries of the English language finally explained.
extempore, extemporary, impromptu, spontaneous, unscripted, ad lib, on-the-spot
improvised, improvisatory, unrehearsed, unplanned, unprepared, unarranged, unpremeditated
makeshift, thrown together, cobbled together
informal off-the-cuff, spur-of-the-moment, off the top of one's head
In this article we explore how to impress employers with a spot-on CV.