Home › Words › U › unsplitunsplitunsplit means not split; whole, undivided.EtymologyFrom un- + split.adjNot split; whole, undivided.verbTo undo the splitting of.e.g.“Like it or not, we are in a motor age and we can no more turn back the clock than we can unsplit the atom.” — 1963, New Mexico Transporter:Definitions & examples from Wiktionary (CC BY-SA 3.0).