The deepened gloom.    From Wordnet, Princeton University. 

Verb (used with object), verb (used without object) : Larger ships will be able to navigate the river after the main channel is deepened. The shadows deepened toward late afternoon. ,a deepening cyclone.    From Dictionary.com. 

Hetty's eyes did not leave his: their expression deepened until they seemed to darken and enlarge.    From Wordnik.com.  [Hetty's Strange History] Reference

And then the uncompromising neutrality of her expression deepened so plainly that he hastened to add.    From Wordnik.com.  [The Rejuvenation of Aunt Mary] Reference

The expression deepened as Harlow, his condition still deteriorating, lurched round a street corner to his left.    From Wordnik.com.  [The Way to Dusty Death]

The expression deepened the lines in his face; that made me wonder if it was a look I had often worn without being aware of it.    From Wordnik.com.  [Renegade's Magic]

The worried expression deepened on Mr. Lewis 'face.    From Wordnik.com.  [The Hidden Places] Reference

Goldie's expression deepened into lines of bitterness.    From Wordnik.com.  [Wagers of Sin]

His reserved expression deepened and he changed the subject.    From Wordnik.com.  [Coroner's Pidgin]

Did not the young man realize that every word deepened the pit he was digging for himself?.    From Wordnik.com.  [The Curse of the Pharaohs]

The worried expression deepened on the visitor's face as he addressed the woman with visible embarrassment.    From Wordnik.com.  [Violets and Other Tales] Reference

She looked very young and fresh and dainty, and the wistful expression deepened on Stephen's face as he looked at her.    From Wordnik.com.  [The Love Affairs of Pixie] Reference

For the next week conversation was more strictly centred on Rosalind than ever, and the gloomy expression deepened on Peggy's face.    From Wordnik.com.  [About Peggy Saville] Reference

Vanamee, hidden in the deep shadow of the archway, did not move, but his eyes closed, and the intense expression deepened on his face.    From Wordnik.com.  [The Octopus : A story of California] Reference

Surfaces were for him, too, something to be "deepened" with a fresh vividness.    From Wordnik.com.  [Adventures in the Arts Informal Chapters on Painters, Vaudeville, and Poets] Reference

Her expression deepened the suggestion.    From Wordnik.com.  [Uneasy Money] Reference

I have been studying you! "and the quizzical expression deepened in his eye.    From Wordnik.com.  [A belle of the fifties : memoirs of Mrs. Clay, of Alabama, covering social and political life in Washington and the South, 1853-66,] Reference

"deepened," and she expresses surprise at how long their marriage has lasted.    From Wordnik.com.  [chicagotribune.com -] Reference

As he "deepened", my thoughts went something like this: "Why are you going on and on like this is a relaxation induction?.    From Wordnik.com.  [Trouble with Instant Hypnosis Inductions] Reference

The 9/11 attacks only deepened Blair's convictions.    From Wordnik.com.  [I Did It My Way] Reference

The official response has only deepened the crisis.    From Wordnik.com.  [BUSINESS: KOREA GOES BUST] Reference

Japan's own experience has only deepened its anxieties.    From Wordnik.com.  [Bottom Dollar] Reference

His new editor only deepened the magazine's personality split.    From Wordnik.com.  [Requiem For A Dream] Reference

"In the last 12 months, the crisis in this sector has deepened.".    From Wordnik.com.  [A Bumper Crop Of Despair] Reference

Over the next few months, Bill's doubts about Iraq only deepened.    From Wordnik.com.  [Brothers in Arms] Reference

Still, the Lieberman pick deepened the sense of a new Great Awakening.    From Wordnik.com.  [Praying To Win] Reference

The cynicism of many African leaders has deepened tensions and poverty.    From Wordnik.com.  [A Generation of Failure] Reference

"The snow had deepened, and we decided to retrace our steps," says Torp.    From Wordnik.com.  ['Miracle In The Mountains'] Reference

Connections among countries have deepened and become more contradictory.    From Wordnik.com.  [Globalization’s Achilles’ Heel] Reference

As his illness deepened, he accused his wife, Alicia, of wanting to lock him away.    From Wordnik.com.  [THE MAN BEHIND A BEAUTIFUL MIND] Reference

The recession of the past year has only deepened the worries about a shrinking pie.    From Wordnik.com.  [A Crisis Of Shattered Dreams] Reference

As autumn deepened, at least five different teams claimed the top spot in the rankings.    From Wordnik.com.  [Win One For The Clipper] Reference

As our relationship lengthened and deepened, we weathered the vicissitudes of the skies.    From Wordnik.com.  [A River Runs Through Me] Reference

In the days since Bishop killed himself, the mystery of his fatal flight has only deepened.    From Wordnik.com.  [A Troubled Teenager's Tragic Final Flight Plan] Reference

Doubts deepened when he sold Laci's SUV and queried Realtors about getting rid of the house.    From Wordnik.com.  [A Husband In Trouble] Reference

Those tactics -- much more widely used than Petraeus's -- only deepened support for the insurgency.    From Wordnik.com.  [WASHINGTON: A GRIM MARCH OF MISSTEPS] Reference

Forbes's distaste for "Washington politicians," learned at his father's knee, has deepened during the campaign.    From Wordnik.com.  [Hunting The Angry Voter] Reference

Those concerns deepened last week when several judges and prosecutors assigned to such cases received death threats.    From Wordnik.com.  [Periscope] Reference

But as the crisis dragged on and deepened, the American people sensed that the president had thought through the risks of war.    From Wordnik.com.  ['This Will Not Stand.'] Reference