Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [1469]
4 : varying from the straight or parallel
— un·even·ly adverb
— un·even·ness noun
Synonyms
[2] broken, bumpy, coarse, irregular, jagged, lumpy, pebbly, ragged, rough, rugged; also lopsided, unbalanced; inexact, irregular, unaligned; undulating, wavy; harsh, scraggly, scratchy; nonuniform
Antonyms
even, flat, level, plane, smooth
[3] erratic, irregular, unequal, unstable, unsteady; also capricious, changeable, changeful, choppy, fickle, fluid, inconsistent, inconstant, mercurial, mutable, uncertain, unsettled, variable, volatile
Antonyms
constant, stable, steady, unchanging, unvarying
un·event·ful adjective : lacking interesting or noteworthy incidents
— un·event·ful·ly adverb
un·ex·am·pled adjective : having no example or parallel : UNPARALLELED
un·ex·cep·tion·able adjective : not open to exception or objection : beyond reproach
un·ex·cep·tion·al adjective 1 : open to no objection
2 : allowing no exception
3 : constituting no exception to the general rule
Synonyms
average, common, commonplace, everyday, normal, ordinary, prosaic, routine, run-of-the-mill, standard, unremarkable, usual, workaday—more at ORDINARY
un·ex·pect·ed adjective : not expected : UNFORESEEN
Synonyms
unanticipated, unforeseen; also unintended, unplanned; improbable, unlikely; startling, surprising
Antonyms
anticipated, expected, foreseen
un·ex·pect·ed·ly adverb : in an unexpected manner
un·ex·pressed adjective : not expressed : not uttered in words
Synonyms
implicit, tacit, unspoken, unvoiced, wordless—more at IMPLICIT
un·fail·ing adjective 1 : not failing, flagging, or waning
2 : INEXHAUSTIBLE
3 : incapable of error
Synonyms
certain, infallible, sure—more at INFALLIBLE
un·fail·ing·ly adverb : in an unfailing manner : without fail
Synonyms
always, constantly, continually, ever, forever, incessantly, invariably, perpetually—more at ALWAYS
un·fair adjective 1 : marked by injustice, partiality, or deception
2 : not equitable in business dealings
— un·fair·ly adverb
— un·fair·ness noun
Synonyms
dirty, foul, illegal, unsportsmanlike
un·faith·ful adjective 1 : not observant of vows, allegiance, or duty : DISLOYAL
2 : INACCURATE, UNTRUSTWORTHY
— un·faith·ful·ly adverb
Synonyms
disloyal, faithless, false, fickle, inconstant, loose, perfidious, recreant, traitorous, treacherous, untrue—more at FAITHLESS
un·faith·ful·ness noun : the quality or state of being unfaithful
Synonyms
disloyalty, faithlessness, falseness, falsity, inconstancy, infidelity, perfidy—more at INFIDELITY
un·fa·mil·iar adjective 1 : not well-known : STRANGE 2 : not well acquainted <~ with the subject> Synonyms fresh, new, novel, original, strange, unaccustomed, unknown—more at NEW un·fa·mil·iar·i·ty noun : the quality or state of being unfamiliar un·fash·ion·able adjective : not in accord with or not following current fashion : not favored socially Synonyms dowdy, inelegant, tacky, tasteless, trashy, unstylish—more at TACKY un·fas·ten verb : to make or become loose : UNDO un·fath·om·able adjective 1 : not capable of being fathomed : IMMEASURABLE 2 : incomprehensible Synonyms [1] boundless, endless, illimitable, immeasurable, indefinite, infinite, limitless, measureless, unbounded, unlimited—more at INFINITE [2] impenetrable, incomprehensible—more at INCOMPREHENSIBLE un·fa·vor·able adjective 1 : set or placed in opposition 2 : not propitious : DISADVANTAGEOUS Synonyms adverse, counter, disadvantageous, hostile, inimical, negative, prejudicial, unfriendly, unsympathetic—more at ADVERSE un·feel·ing adjective 1 : lacking feeling 2 : devoid of kindness or sympathy — un·feel·ing·ly adverb Synonyms [1] asleep, dead, numb—more at NUMB [2] callous, hard, heartless, merciless, pitiless, stony, uncharitable, unsparing, unsympathetic—more at HARD un·feigned adjective : not feigned : not hypocritical : GENUINE un·fem·i·nine adjective : not suitable to or appropriate for a woman : not characteristic