Feeling an inappropriate lack of seriousness.

Roget 605: irresolution, infirmity of purpose, indecision; indetermination, undetermination^†; unsettlement; uncertainty etc. 475; demur, suspense; hesitating etc. v., hesitation, hesitancy; vacillation; changeableness etc. 149; fluctuation; alternation etc. (oscillation) 314; caprice etc. 608.    fickleness, levity, legerete [Fr.]; pliancy etc. (softness) 324; weakness; timidity etc. 860; cowardice etc. 862; half measures.    waverer, ass between two bundles of hay; shuttlecock, butterfly; wimp; doughface [U.S.].    ... show more

Roget 863: rashness etc. adj.; temerity, want of caution, imprudence, indiscretion; overconfidence, presumption, audacity.    precipitancy, precipitation; impetuosity; levity; foolhardihood^†, foolhardiness; heedlessness, thoughtlessness etc. (inattention) 458; carelessness etc. (neglect) 460; desperation; Quixotism, knight-errantry; fire eating.    gaming, gambling; blind bargain, leap in the dark, leap of faith, fool's paradise; too many eggs in one basket.    desperado, rashling^†, madcap, daredevil, Hotspur, fire eater, bully, bravo, Hector, scapegrace, enfant perdu [Fr.]; Don Quixote, knight-errant, Icarus; adventurer; gambler, gamester; dynamitard^†; boomer [U.S.].    ... show more

Roget 842: wit, humor, wittiness; sense of humor; attic wit, attic salt; atticism^†; salt, esprit, point, fancy, whim, drollery, pleasantry.    farce, buffoonery, fooling, tomfoolery; shenanigan [U.S.], harlequinade etc. 599^†; broad farce, broad humor; fun, espieglerie [Fr.]; vis comica [Lat.].    jocularity; jocosity, jocoseness^†; facetiousness; waggery, waggishness; whimsicality; comicality etc. 853.    banter, badinage, retort, repartee, smartness, ready wit, quid-pro-quo; ridicule etc. 856.    jest, joke, jape, jibe; facetiae [Lat.], levity, quips and cranks; capital joke; canorae nugae [Lat.]; standing jest, standing joke, private joke, conceit, quip, quirk, crank, quiddity, concetto^†, plaisanterie [Fr.], brilliant idea; merry thought, bright thought, happy thought; sally; flash of wit, flash of merriment; scintillation; mot [Fr.], mot pour rire [Fr.]; witticism, smart saying, bon-mot, jeu d'esprit [Fr.], epigram; jest book; dry joke, quodlibet, cream of the jest.    word-play, jeu de mots [Fr.]; play of words, play upon words; pun, punning; double entente, double entendre [Fr.] etc. (ambiguity) 520; quibble, verbal quibble; conundrum etc. (riddle) 533; anagram, acrostic, double acrostic, trifling, idle conceit, turlupinade^†.    old joke, tired joke, flat joke, Joe Miller^†.    ... show more

Roget 836: cheerfulness etc. adj.; geniality, gayety, l'allegro [Fr.], cheer, good humor, spirits; high spirits, animal spirits, flow of spirits; glee, high glee, light heart; sunshine of the mind, sunshine of the breast; gaiete de coeur [Fr.], bon naturel [Fr.].    liveliness etc. adj.; life, alacrity, vivacity, animation, allegresse^†; jocundity, joviality, jollity; levity; jocularity etc. (wit) 842.    mirth, merriment, hilarity, exhilaration; laughter etc. 838; merrymaking etc. (amusement) 840; heyday, rejoicing etc. 838; marriage bell.    nepenthe, Euphrosyne^†, sweet forgetfulness.    optimism etc. (hopefulness) 858; self complacency; hedonics^†, hedonism.    ... show more

Roget 320: levity; lightness etc. adj.; imponderability, buoyancy, volatility.    feather, dust, mote, down, thistle, down, flue, cobweb, gossamer, straw, cork, bubble, balloon; float, buoy; ether, air.    leaven, ferment, barm^†, yeast.    lighter-than-air balloon, helium balloon, hydrogen balloon, hot air balloon.    convection, thermal draft, thermal.    ... show more

Roget 643: unimportance, insignificance, nothingness, immateriality.    triviality, levity, frivolity; paltriness etc. adj.; poverty; smallness etc. 32; vanity etc. (uselessness) 645; matter of indifference etc. 866; no object.    nothing, nothing to signify, nothing worth speaking of, nothing particular, nothing to boast of, nothing to speak of; small matter, no great matter, trifling matter etc. adj.; mere joke, mere nothing; hardly anything; scarcely anything; nonentity, small beer, cipher; no great shakes, peu de chose [Fr.]; child's play, kinderspiel.    toy, plaything, popgun, paper pellet, gimcrack, gewgaw, bauble, trinket, bagatelle, Rickshaw, knickknack, whim-wham, trifle, trifles light as air;" yankee notions [U.S.].    trumpery, trash, rubbish, stuff, fatras^†, frippery; leather or prunello;" chaff, drug, froth bubble smoke, cobweb; weed; refuse etc. (inutility) 645; scum etc. (dirt) 653.    joke, jest, snap of the fingers; fudge etc. (unmeaning) 517; fiddlestick^†, fiddlestick end^†; pack of nonsense, mere farce.    straw, pin, fig, button, rush; bulrush, feather, halfpenny, farthing, brass farthing, doit^†, peppercorn, jot, rap, pinch of snuff, old son; cent, mill, picayune, pistareen^†, red cent [U.S.].    minutiae, details, minor details, small fry; dust in the balance, feather in the scale, drop in the ocean, flea-bite, molehill.    nine days' wonder, ridiculus mus [Lat.]; flash in the pan etc. (impotence) 158; much ado about nothing etc. (overestimation) 482.    ... show more

A manner lacking seriousness.