• WordNet 3.6
    • adj unfriendly not disposed to friendship or friendliness "an unfriendly coldness of manner","an unfriendly action to take"
    • adj unfriendly not easy to understand or use "user-unfriendly"
    • adj unfriendly very unfavorable to life or growth "a hostile climate","an uncongenial atmosphere","an uncongenial soil","the unfriendly environment at high altitudes"
    • adj unfriendly not friendly "an unfriendly act of aggression","an inimical critic"
    • ***
Webster's Revised Unabridged Dictionary
    • Unfriendly Not favorable; not adapted to promote or support any object; as, weather unfriendly to health.
    • Unfriendly Not friendly; not kind or benevolent; hostile; as, an unfriendly neighbor.
    • ***
Century Dictionary and Cyclopedia
    • unfriendly Not friendly; not kind or benevolent; inimical: as, an unfriendly neighbor.
    • unfriendly Not favorable; not adapted to promote or support any object.
    • unfriendly Synonyms Hostile, inimical, antagonistic. See amicable.
    • unfriendly In an unkind manner; not as a friend.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Unfriendly un-frend′li not friendly, kind, or favourable
    • adv Unfriendly in an unkind manner
    • ***


  • Walter Bagehot
    “A severe though not unfriendly critic of our institutions said that the cure for admiring the House of Lords was to go and look at it.”


In literature:

However, we do not wish to take steps that might appear unfriendly.
"With Moore at Corunna" by G. A. Henty
I don't say, though, that I feel unfriendly to Mr. Morgan.
"The Magnificent Ambersons" by Booth Tarkington
The farmer's wife pushed a piece of bread towards his coffee-cup and made up an unfriendly face.
"What Sami Sings with the Birds" by Johanna Spyri
And can ye thus unfriended leave me?
"Lyrical Ballads 1798" by William Wordsworth
Mulready started and fixed him with a troubled and unfriendly stare.
"The Black Bag" by Louis Joseph Vance
The painters here, let me tell you, are very unfriendly to me.
"Albert Durer" by T. Sturge Moore
It was not unfriendly; it was, indeed, consistently respectful, almost reverential.
"K" by Mary Roberts Rinehart
Now, as he came into the lounge from the big oak staircase, he instantly realized that he had entered an unfriendly atmosphere.
"The Yellow Streak" by Valentine Williams
She gave him a single sidelong look, unfriendly, even fierce.
"The Magnetic North" by Elizabeth Robins (C. E. Raimond)
Somehow, the thought made her feel very small and alone and unfriended.
"The Power and the Glory" by Grace MacGowan Cooke

In poetry:

The blind goes out, and I wander
To the old, unfriendly sea,
The lonelier for the memory
That walks like a ghost with me.
"In The Placid Summer Midnight" by William Ernest Henley
Helpless, unfriended, forsaken;
Haunted and tracked by the Past,
With fragments of pitiless voices,
And desolate faces aghast!
"For Ever" by Henry Kendall
All nations live by ideals; but in need
They linger with no ethic obsolete;
They bend the knee to no unfriendly creed;
But tramp their values firm beneath an army's feet.
"Reason And Honour " by Eden Phillpotts
VI. For they tell me, alone and unfriended thou'rt left
On the pillow of sickness to languish;
By absence, by fate, of the fond friend bereft
Who could feel for, and solace, thy anguish.
"The Swan Quill" by Sydney Owenson
Unfriendly friendly universe,
I pack your stars into my purse,
And bid you so farewell.
That I can leave you, quite go out,
Go out, go out beyond all doubt,
My father says, is the miracle.
"The Child Dying" by Edwin Muir
With all a mother’s doting love a mother yearned for him,
And watching for his quick return, a sister’s eye grew dim,
And, dearer still, a gentle girl, his fair affianced bride,—
And yet, with all these loving ones, unfriended, had he died.
"The Soldier’s Death" by Rosanna Eleanor Leprohon

In news:

Nat'l Unfriend Day gets start here in the ROC.
Brad Paisley and Darius Rucker celebrated the Jimmy Kimmel's idea for "National Unfriend Day" by performing an original song this week in Rochester, New York.
Jimmy Kimmel Calls for "National Unfriend Day".
The word of the year is " unfriend ".
Florida judges, lawyers must ' unfriend ' on Facebook.
" Unfriend " the Word of the Year.
Brad Paisley and Darius Rucker help Jimmy Kimmel celebrate National UnFriend Day with a new song.
Someone of them can sound pretty harsh or they're not at all what you believe in so, simply enough, you can unfriend them on Facebook.
Check out the "Unfreid Song" from Brad Paisley and Darius Rucker and then leave a comment below about who you're unfriending and why.
Unfriending is the new way to tell someone you are over them.
You're About to Get Unfriended .
Have you been unfriended and don't know why.
I found this list of reasons why people get unfriended on Facebook.
A couple of years ago, Jimmy Kimmel declared November 17th "National UnFriend Day".
The Cunningham family had an unfriendly experience at a New Hampshire Friendly's restaurant last month.

In science:

Since, however, in general pseudo-Riemannian space-time no preferred coordinates of this type exist, this manifold seems to present an unfriendly environment for canonical quantization.
Quantum Theory within the Framework of General Relativity
Moreover, the rule that governed the bugs’ movement is inherently asymmetric: every site’s rotor begins pointing East, so there was no guarantee that the set of occupied sites would even appear symmetric under rotation by 90◦ , much less by unfriendly angles.
Goldbug Variations
Strings are particularly unfriendly structures for the peeling algorithm; peeling takes linear time to peel such structures.
The Set of Solutions of Random XORSAT Formulae
Surprisingly and contrary to common wisdom, classical Newtonian physics is more hostile and unfriendly to determinism than either quantum mechanics or special relativity .
Zeno meets modern science
We can model in this fashion the reactions of agents to `unfriendly' neighbourhood.
Simple queueing approach to segregation dynamics in Schelling model