unsplit

adj

1. (not-comparable)Not split; whole, undivided.

verb

1. (transitive)To undo the splitting of.

   “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.”

   “To unsplit the split, click on the View Menu buttons and choose Unsplit Left/Right (v6.2) or Unsplit Main (v6.3).”