Webster's Revised Unabridged Dictionary · 1913

Ado

Ado (ȧ*do") , v. inf.

[Old English at do, northern form for to do. Compare Affair.]

1.
To do; in doing; as, there is nothing ado.
What is here ado? — J. Newton
2.
Doing; trouble; difficulty; troublesome business; fuss; bustle; as, to make a great ado about trifles.
With much ado, he partly kept awake. — Dryden
Let's follow to see the end of this ado. — Shakespeare