Adjective : an unbecoming hat; unbecoming language.    From Dictionary.com. 

If we sow indulgence we shall reap anger, selfishness, irritability, "unbecomingness" -- the spoiled child.    From Wordnik.com.  [The Mother and Her Child] Reference

Too stunned to resist, I allowed her to dress my hair, tying back the sidelocks with primrose ribbon, clucking over the unfeminine unbecomingness of my shoulder-length bob.    From Wordnik.com.  [Sick Cycle Carousel] Reference

Nevertheless this unbecomingness is outweighed by necessity: and for this reason such persons can plead either their own cause or that of persons closely connected with them.    From Wordnik.com.  [Summa Theologica, Part II-II (Secunda Secundae) Translated by Fathers of the English Dominican Province] Reference

Reply Obj. 2: Persons are related by affinity through one who is related by consanguinity: and therefore since the one depends on the other, consanguinity and affinity entail the same kind of unbecomingness.    From Wordnik.com.  [Summa Theologica, Part II-II (Secunda Secundae) Translated by Fathers of the English Dominican Province] Reference

Both of these, however, may be referred to the words which may happen to be sinful, either by reason of excess which belongs to "loquaciousness," or by reason of unbecomingness, which belongs to "scurrility.".    From Wordnik.com.  [Summa Theologica, Part II-II (Secunda Secundae) Translated by Fathers of the English Dominican Province] Reference

Therefore that unbecomingness (and what that is may be understood from the definition we have given of what is becoming) is visible here also, when some sublime expression is used metaphorically, and is used in a lowly style of oration, though it might have been becoming in.    From Wordnik.com.  [The Orations of Marcus Tullius Cicero, Volume 4] Reference

She merely desired, like many of us, the comfort of being selfish without the unbecomingness of appearing so.    From Wordnik.com.  [Captain Desmond, V.C.] Reference

This accounted for her strange appearance; but Fleming noticed that the girl's manner had not the slightest consciousness of their unbecomingness, nor of the charms of face and figure they had marred.    From Wordnik.com.  [From Sand Hill to Pine] Reference

For, after all, the second glance showed him as so much the same, the same to the unbecomingness of his clothes, the flatness of his features, the general effect of decision and placidity that he always, predominatingly, gave.    From Wordnik.com.  [Franklin Kane] Reference

She would not have been herself had there appeared any neglect or unbecomingness in her costume, but she wore the least pretentious of morning gowns, close at throat and wrist, which aided her look of mental concentration and alertness.    From Wordnik.com.  [The Whirlpool] Reference

A sense of stricture in the throat stopped her, as her eyes took in the washed-out colour of the thin face, the washed-out colour of the thin hair -- thin drab hair, dragged in straight, hard unbecomingness from the forehead and cheeks.    From Wordnik.com.  [The Shuttle] Reference

'Naughty children,' said Wilmet, but with more than usual lenience to the combined effects of Huggeny and of Clement's severe countenance in producing one of those paroxysms of giggle that seem invincible in proportion to their unbecomingness.    From Wordnik.com.  [The Pillars of the House, V1] Reference

In this instance Brother Hecker's chagrin was not overcome by his sense of the ludicrous, for he was naturally very sensitive of personal unbecomingness, and although not precisely a martinet for clerical exactness, he had strict notions of propriety.    From Wordnik.com.  [Life of Father Hecker] Reference

As I went over, mentally, the particulars of my unbecomingness, and saw Miss Ellerton's eyes resting inquisitively and furtively on the mountain of pigeon bones lifting their well picked pyramid to my chin, I wished myself an ink-fish at the bottom of the sea.    From Wordnik.com.  [Fun-jottings, or, Laughs I have taken a pen to] Reference

She could not in the least make clear to herself the reasons for her husband's dislike to his presence -- a dislike painfully impressed on her by the scene in the library; but she felt the unbecomingness of saying anything that might convey a notion of it to others.    From Wordnik.com.  [Middlemarch] Reference

(on the grounds of unbecomingness) by gently-tinted draperies of some fabric suggesting Liberty's.    From Wordnik.com.  [Love's Shadow] Reference

A dislike painfully impressed on her by the scene in the library; but she felt the unbecomingness of saying anything that might convey.    From Wordnik.com.  [Middlemarch] Reference

24.) intimating the insolency and unbecomingness of his answer.    From Wordnik.com.  [Essays and Miscellanies] Reference

But of all the ways whereby children are to be instructed, and their manners formed, the plainest, easiest, and most efficacious, is, to set before their eyes the examples of those things you would have them do, or avoid; which, when they are pointed out to them, in the practice of persons within their knowledge, with some reflections on their beauty and unbecomingness, are of more force to draw or deter their imitation, than any discourses which can be made to them.    From Wordnik.com.  [Some Thoughts Concerning Education. Sections 81-90] Reference

Children being to be restrain’d by the parents only in vicious (which, in their tender years, are only a few) things, a look or nod only ought to correct them when they do amiss; or, if words are sometimes to be us’d, they ought to be grave, kind, and sober, representing the ill or unbecomingness of the faults, rather than a hasty rating of the child for it; which makes him not sufficiently distinguish, whether your dislike be not more directed to him than his fault.    From Wordnik.com.  [Some Thoughts Concerning Education. Sections 71-80] Reference

At length, by dint of much wriggling, and loud and incessant expostulations upon the unbecomingness of his hugging a fellow male in that matrimonial sort of style, I succeeded in extracting a grunt; and presently, he drew back his arm, shook himself all over like a Newfoundland dog just from the water, and sat up in bed, stiff as a pike-staff, looking at me, and rubbing his eyes as if he did not altogether remember how I came to be there, though a dim consciousness of knowing something about me seemed slowly dawning over him.    From Wordnik.com.  [Moby Dick, or, the whale] Reference