In the book, a tycoon unaccountably becomes the hero's friend.    From Wordnet, Princeton University. 

For example, the counting numbers are a trivial infinity compared to the "unaccountably" infinite irrational numbers.    From Wordnik.com.  [The war between the human race and the vampire elites has been raging for over 6,000 years.] Reference

The OED has it s.v. candle-wick, but offers no suggestion as to the origin of the name, so "unaccountably" is the mot juste.    From Wordnik.com.  [languagehat.com: W.G. SEBALD.] Reference

The day that she had foreseen soon came; the Brazilian's banker "unaccountably" had omitted to send him any money, and so he borrowed some of her.    From Wordnik.com.  [Selected Writings of Guy De Maupassant] Reference

On the contrary she seemed unaccountably depressed.    From Wordnik.com.  [Little Lost Sister] Reference

It angered her both unreasonably and unaccountably.    From Wordnik.com.  [Flamsted quarries] Reference

I feel unaccountably sorry for him and for the woman.    From Wordnik.com.  [One-Way Ticket] Reference

He was not loquacious, and Dora was unaccountably shy.    From Wordnik.com.  [The Scarlet Feather] Reference

If any mortal suddenly and unaccountably disappeared, the.    From Wordnik.com.  [Myths and Legends of Ancient Greece and Rome] Reference

She was in no pain; only her head felt unaccountably heavy.    From Wordnik.com.  [The Hermit of Far End] Reference

Yellin 'Kid who was so mysteriously and unaccountably lost.    From Wordnik.com.  [The Boy Ranchers on Roaring River or Diamond X and the Chinese Smugglers] Reference

Drake sighed at the naïve retort, then sighed unaccountably.    From Wordnik.com.  [Nell, of Shorne Mills or, One Heart's Burden] Reference

The expedition against Crown Point was unaccountably delayed.    From Wordnik.com.  [The Rise of Canada, from Barbarism to Wealth and Civilisation Volume 1] Reference

"It's my job, that's all," Gloria said, feeling unaccountably shy.    From Wordnik.com.  [Hex] Reference

He's unaccountably bright in many ways and just as unaccountably slow in others.    From Wordnik.com.  [The Short Life] Reference

"Certainly not," I said coolly, for I was unaccountably irritated by the suggestion.    From Wordnik.com.  [The Rose of Old St. Louis] Reference

His bold, lyrical images stay in your head, like an unaccountably beautiful nightmare.    From Wordnik.com.  [Noyce: Double Integrity] Reference

"I am in truth so unaccountably local in the use of my pen," he wrote to Lady Hesketh.    From Wordnik.com.  [Highways & Byways in Sussex] Reference

And, though he knew that the lack of recognition was for his own safety, it hurt, unaccountably.    From Wordnik.com.  [The Genius] Reference

It was even so: as much of the language as I ever knew was suddenly and unaccountably restored to me.    From Wordnik.com.  [The Atlantic Monthly, Volume 20, No. 122, December, 1867] Reference

Though Fremont had so unaccountably delayed, yet when he came he was received with confidence and enthusiasm.    From Wordnik.com.  [The Life of Abraham Lincoln] Reference

The recollection of his monstrous cruelties, -- his cruel flagellations, -- is still unaccountably depressing.    From Wordnik.com.  [The Modern Scottish Minstrel, Volume V. The Songs of Scotland of the Past Half Century] Reference

The world is full of such; they spring up, unaccountably, in locations where they appear to the least advantage.    From Wordnik.com.  [The Spinner's Book of Fiction] Reference

This was the day of his first fight, but since he had got up everything was unaccountably unlike his expectation.    From Wordnik.com.  [Impressions of a War Correspondent] Reference

The thing that had unaccountably stirred her most since her arrival was an unexpected meeting with Bailey Girard.    From Wordnik.com.  [McClure's Magazine, Vol 31, No 2, June 1908] Reference

And yet, as the clock ticked off second after second, the faithful Vladimir grew unaccountably fretful and restless.    From Wordnik.com.  [The Genius] Reference

There were nervy, irritating moments when waggons in front halted unaccountably; and, just before the railway crossing.    From Wordnik.com.  [Pushed and the Return Push] Reference

The fact that Reine had so unaccountably refused to marry the grand chasserot did not seem to him sufficient encouragement.    From Wordnik.com.  [The French Immortals Series — Complete] Reference

Seen from the rear he had the appearance of a neat, if excited, package, unaccountably frilled about with embroidered flannel.    From Wordnik.com.  [McClure's Magazine, Vol. XXXI, No. 3, July 1908.] Reference

No sooner, however, did he settle to serious play, beaming with triumph at his good fortune, than it unaccountably deserted him.    From Wordnik.com.  [Punch, or the London Charivari, Vol. 146, June 3, 1914] Reference

It stayed unaccountably still; then it began to jerk forward and back most strangely, switching against the glass before his eyes.    From Wordnik.com.  [The Pirate Shark] Reference

Even the talking Ents (left), always one of the story's goofier elements, charm here, despite looking, unaccountably, like ZZ Top.    From Wordnik.com.  [Theater: 'Ring' a Ding Ding] Reference

Another element which might prove of value to them was the new acquisition in the man who had come so unaccountably to their home.    From Wordnik.com.  [The Wonder Island Boys: The Mysteries of the Caverns] Reference

The child's singing of her last song had induced in him then -- wholly unawares, wholly unaccountably -- a sudden mental nausea and.    From Wordnik.com.  [Flamsted quarries] Reference

Cornal and the Paymaster he went to see them depart, the General left at home in his parlour, unaccountably unwilling to say good-bye.    From Wordnik.com.  [Gilian The Dreamer His Fancy, His Love and Adventure] Reference

The latter part of the following interesting anecdote of Garrick is unaccountably omitted in his life, by his biographer, Arthur Murphy.    From Wordnik.com.  [The Mirror of Taste, and Dramatic Censor, Vol. I, No. 4, April 1810] Reference

He had never imagined there would be any difficulty in this interview, yet he found himself unaccountably at a loss before these two men.    From Wordnik.com.  [Christopher Hibbault, Roadmaker] Reference

Whether it was the reflex action of the brain from the excitement of the evening or not, but the fact was I felt unaccountably depressed.    From Wordnik.com.  [The Motor Pirate] Reference

Now this affair which had no small influence in determining the fortune of the day, with many parallel traits, our gazetteers have unaccountably neglected to publish.    From Wordnik.com.  [The Mirror of Taste, and Dramatic Censor Volume I, Number 1] Reference

In opposition to this head without a body, unaccountably displayed as a sign at an eating-house, there is a body without a head, hanging out as the sign of a distiller's.    From Wordnik.com.  [The Works of William Hogarth: In a Series of Engravings With Descriptions, and a Comment on Their Moral Tendency] Reference