Irregular

Adjective

 * 1) Nonstandard; not conforming to rules or expectations.
 * 2) Of a surface, rough.

Antonyms

 * regular

Derived terms

 * irregular plural
 * irregular verb

Noun

 * 1) A soldier who is not a member of an official military force and, often, does not follow regular army tactics.

Adverbs for Irregular
shamefully; disgracefully; furtively; openly; strangely; deplorably; cruelly; dangerously; secretly;  unfortunately; terribly; slightly; gravely; seriously; suspiciously; egregiously; highly; utterly; wildly; lamentably; unpardonably; inexcusably; unsatisfactorily; unacceptably; disagreeably; disgustingly; indiscreetly; imprudently; unhappily.

Thesaurus
Bohemian, Charley, Mickey Mouse, VC, Vietcong, aberrant, abnormal, actionable, adrift, affable, afloat, against the law, aimless, alternating, amorphous, anamorphous, anarchic, anarchistic, anomalistic, anomalous, anomic, askew, asymmetric, asymmetrical, atypical, base, bent, bizarre, black-market, bootleg, bowed, broken, broken off, bumpy, bushfighter, bushwhacker, capricious, careening, casual, catchy, changeable, changeful, changing, chargeable, cheap, cheesy, chopped-off, choppy, coarse, coarse-grained, cockeyed, common, contorted, contraband, contrary to law, cordial, corrugated, craggy, crank, crankish, cranky, crazy, criminal, crooked, cross-grained, crotchety, crumpled, crunched, decousu, degage, designless, desultory, deviable, deviant, deviating, deviative, deviatory, different, disarticulated, disconnected, discontinued, discontinuous, discrete, disjunct, disjunctive, disordered, disorderly, disparate, dispersed, disproportional, disproportionate, distorted, divaricate, divergent, diversified, diversiform, dizzy, dotty, easy, easygoing, eccentric, episodic, erose, erratic, exceptional, extraordinary, familiar, fast and loose, felonious, fey, fickle, fitful, flaky, flawed, flickering, flighty, flitting, fluctuating, folksy, formless, fourth-class, freakish, freaky, free and easy, frivolous, funny, giddy, gracious, grainy, granulated, gratuitous, guerrilla, guttering, halting, haphazard, haymish, herky-jerky, heteroclite, heteromorphic, hit-or-miss, homely, homespun, homey, horripilant, idiocratic, idiosyncratic, ill-matched, ill-sorted, illegal, illegitimate, illicit, immethodical, impermissible, impetuous, impulsive, inadequate, inchoate, incoherent, inconsistent, inconstant, indecisive, indiscriminate, inequal, inferior, infirm, informal, insufficient, intermittent, intermitting, interrupted, irresolute, irresponsible, jagged, jerky, jolty, justiciable, kinky, kooky, labyrinthine, lawless, linsey-woolsey, loose, lopsided, low-class, low-grade, low-quality, low-test, lumpy, lurching, maggoty, maquis, maquisard, mazy, mean, meaningless, mercurial, mismatched, misshapen, moody, motley, mutable, natural, nonconforming, nonconformist, nonconstitutional, noncontinuous, nonlegal, nonlicit, nonlinear, nonsequential, nonserial, nonstandard, nonsymmetric, nonsymmetrical, nonsystematic, nonuniform, nutty, occasional, odd, oddball, off-balance, off-key, offbeat, offhand, offhanded, one-sided, orderless, out of proportion, outlaw, outlawed, overbalanced, paltry, parenthetic, partisan, patchy, patriot, peculiar, pimply, pitted, plain, planless, pluralistic, pocky, poor, potholed, promiscuous, punishable, punk, purposeless, queer, quirky, ragged, rambling, random, rank, relaxed, resistance, resistance fighter, restless, ripply, rough, rough-grained, rough-hewn, roving, ruffled, rutted, rutty, scatterbrained, schlock, schmatte, scrappy, screwball, screwy, second, second-best, second-class, seedy, senseless, shabby, shagged, shaggy, shapeless, shifting, shifty, shuffling, simple, singular, skew, skewed, snatchy, sociable, spasmatic, spasmic, spasmodic, spastic, spineless, sporadic, spotty, sprung, staggering, straggling, straggly, strange, stray, straying, subnormal, suspended, systemless, tacky, textured, third, third-class, third-rate, tinny, tortuous, triable, twisted, unaccountable, unaffected, unallowed, unarranged, unassuming, unauthorized, unbalanced, unceremonious, uncertain, unclassified, uncommon, unconnected, unconsidered, unconstitutional, unconstrained, uncontrolled, unconventional, undependable, under-the-counter, under-the-table, underground, underground fighter, undirected, undisciplined, unequable, unequal, uneven, unfixed, ungraded, unique, unjoined, unkempt, unlawful, unlevel, unmethodical, unmetrical, unnatural, unofficial, unordered, unorganized, unorthodox, unpolished, unpredictable, unrefined, unregular, unreliable, unrestrained, unrhythmical, unsettled, unsmooth, unsorted, unstable, unstable as water, unstaid, unstatutory, unsteadfast, unsteady, unstudied, unsuccessive, unsymmetric, unsymmetrical, unsystematic, ununiform, unusual, unwarrantable, unwarranted, vacillating, vagrant, vague, variable, variegated, variform, various, varying, veering, vicissitudinary, vicissitudinous, volatile, wacky, wandering, wanton, warped, wavering, wavery, wavy, wayward, weird, whimsical, wimpled, wishy-washy, wobbling, wobbly, wrongful

Etymology
From irreguler <  irregularis (in- + regularis).

Adjective

 * Chinese: wúcháng
 * Dutch:
 * Esperanto: neregulara
 * Finnish: ,
 * French: irregulier
 * German:


 * Greek: ακανόνιστος, αντικανονικός
 * Japanese: 不規則な (hukisokuna), 変則的な (hensokutekina)
 * Latin: inconditus, incondita, inconditum
 * Polish: nieregularny, nieregularna , nieregularne
 * Romanian: iregular, nereglementar, neregulat
 * Spanish:
 * Swedish:


 * Czech:
 * Finnish: ,
 * Greek:


 * Icelandic:
 * Latin: anomalus, anomala, anomalum
 * Polish: nieregularny, nieregularna , nieregularne

Noun

 * Greek:

Adjective

 * 1) irregular

Adjective

 * 1) irregular