detracting from one's appearance, character, or reputation; unattractive or unseemly: an unbecoming hat; unbecoming language.
Origin of unbecoming
Related formsun·be·com·ing·ly, adverbun·be·com·ing·ness, noun
First recorded in 1590–1600; un-1
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for unbecomingly
Historical Examples of unbecomingly
I would not wish to be unbecomingly attired on so joyous an occasion.
Why did you come so mysteriously, and, I must say, unbecomingly?
For just look at the reveller Alcibiades, how unbecomingly he behaves.
They have grown older, some gracefully, some under protest, some most unbecomingly.
We learn with sorrow, that our curate has confessed to unbecomingly behaviour, and that he has been seen even kissing.
British Dictionary definitions for unbecomingly
Derived Formsunbecomingly, adverbunbecomingness, noun
unsuitable or inappropriate, esp through being unattractivean unbecoming hat
(when postpositive, usually foll by of or an object) not proper or seemly (for)manners unbecoming a lady
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for unbecomingly
Online Etymology Dictionary, © 2010 Douglas Harper