Adjective : a witching potion.    From Dictionary.com. 

Verb (used with object) : She witched him into going.    From Dictionary.com. 

Volume soared across the board on a "witching" day of options expirations.    From Wordnik.com.  [U.S. Stocks Remain Higher In Light Turnover - Investors.com] Reference

This is called the witching hour.    From Wordnik.com.  [CNN Transcript Jun 12, 2007] Reference

Triple witching -- again, it's a market technical.    From Wordnik.com.  [CNN Transcript Sep 21, 2001] Reference

'SENZA MOCCOLI!' black, witching eyes -- farewell!.    From Wordnik.com.  [The Continental Monthly , Vol. 2 No. 5, November 1862 Devoted to Literature and National Policy] Reference

Throw their pale shadows o'er this witching scene.    From Wordnik.com.  [The Mirror Of Literature, Amusement, And Instruction Volume 14, No. 391, September 26, 1829] Reference

It's triple -- actually, that's not witching though.    From Wordnik.com.  [CNN Transcript Dec 30, 2005] Reference

Drawing my secrets forth, witching my soul with talk.    From Wordnik.com.  [Ionica] Reference

There fall those witching sounds they've heard before.    From Wordnik.com.  [Rowena & Harold A Romance in Rhyme of an Olden Time, of Hastyngs and Normanhurst] Reference

"I do; for that witching hour is certainly near at hand.".    From Wordnik.com.  [Derrick Sterling A Story of the Mines] Reference

She had a witching mouth, a dainty nose, and an open brow.    From Wordnik.com.  [French Mediaeval Romances from the Lays of Marie de France] Reference

At the witching hour of twilight doth my memory love to dwell.    From Wordnik.com.  [Sagittulae, Random Verses] Reference

But this lot still waiting patiently for what is witching hour.    From Wordnik.com.  [CNN Transcript Jul 20, 2007] Reference

So full of beauty's witching grace, were lightly hovering round.    From Wordnik.com.  [The Poetical Works of Mrs. Leprohon] Reference

There was something extremely witching in her precocious charms.    From Wordnik.com.  [A Love Story] Reference

That but lured away our moments with its subtle, witching powers.    From Wordnik.com.  [Lays from the West] Reference

We are facing what Wall Street would call the "triple witching hour.".    From Wordnik.com.  [Borderline Dumb] Reference

And they were strange and weird -- that is, wild, unnatural, and witching.    From Wordnik.com.  [Lord Dolphin] Reference

Then came the twelve long deliberate strokes announcing the witching hour.    From Wordnik.com.  [A Dixie School Girl] Reference

O'BRIEN: You know on Wall Street they talk about those triple-witching days?.    From Wordnik.com.  [CNN Transcript Dec 30, 2005] Reference

So that when we finally tumbled in, it was long after the witching hour of night.    From Wordnik.com.  [S.O.S. Stand to!] Reference

Soldiers call this the witching hour, dusk when insurgents often ramp up their fight.    From Wordnik.com.  [CNN Transcript Jun 23, 2007] Reference

Soldiers call this the witching hour, dusk, when insurgents often ramp up their fight.    From Wordnik.com.  [CNN Transcript Jun 18, 2007] Reference

But she further conceded that she had not meant to rise at the witching hour of three A. M.    From Wordnik.com.  [Rainbow Hill] Reference

Night waned upon this talk; and even the witching hour had gone by, before we retired to rest.    From Wordnik.com.  [The International Monthly, Volume 3, No. 1, April, 1851] Reference

The witching hour over and I have seen no woodland spirits come to haunt us, and no human beings.    From Wordnik.com.  [The Girl Scouts in Beechwood Forest] Reference

It was thought that the witching power belonged to families, and descended from mothers to daughters.    From Wordnik.com.  [Welsh Folk-Lore a Collection of the Folk-Tales and Legends of North Wales] Reference

Harting, and had the power of witching herself into a hare, and was continually, like Hecate, attended by dogs.    From Wordnik.com.  [Highways & Byways in Sussex] Reference

At that "witching hour of night when churchyards yawn," we also had a touch of the gaping fit, and thought of rest.    From Wordnik.com.  [A Yacht Voyage to Norway, Denmark, and Sweden 2nd edition] Reference

Taller than her compeers, -- in all she said or did, a native dignity and a witching grace were exquisitely blended.    From Wordnik.com.  [A Love Story] Reference

Today was quadruple witching, options expirations which accounted for some of the volatility and a lot of the volume.    From Wordnik.com.  [CNN Transcript Jun 20, 2003] Reference

It's almost the witching hour so we'd like to share some Halloween safety tips from our fellow bloggers at Consumer Reports.    From Wordnik.com.  [This week in safety] Reference

That smiling face, with its sparkling eyes and its witching smile, was another thing, and seemed to belong to another person.    From Wordnik.com.  [The Lady of the Ice A Novel] Reference

All three "heavy-weights" of monetary union -- Germany, France and Italy -- also suffer from a kind of "triple witching hour.".    From Wordnik.com.  [Europe Misses The Point] Reference

It was only rarely she tried her English, though, when she did, it was with such a witching grace I could have wished it oftener.    From Wordnik.com.  [The Rose of Old St. Louis] Reference

"But I've promised myself a whole night with you, and I'm not going to be chased away, just at the witching hour," Tavia insisted.    From Wordnik.com.  [Dorothy Dale : a girl of today] Reference

Noon came, that witching time with all who labor in the fields or woods, and not until then did Mr. Logan lay down his clumsy hoe.    From Wordnik.com.  [The Atlantic Monthly, Volume 16, No. 96, October 1865] Reference

I had sometimes fondly, though vainly, dreamed of, with all its witching possibilities and which now lay crumbled to dust at my feet.    From Wordnik.com.  [The Doctor's Daughter] Reference

Instead, Papandreou and others shuttled to Belgrade, seeking to convince Milosevic that, as Rondos puts it, "the witching hour had come.".    From Wordnik.com.  [Greek Revival] Reference