A difficult problem.

synoniemen: brain-teaser, conundrum, enigma.

Roget 652: cleanness, cleanliness etc. adj.; purity; cleaning etc. v.; purification, defecation etc. v.; purgation, lustration^†; detersion^†, abstersion^†; epuration^†, mundation^†; ablution, lavation^†, colature^†; disinfection etc. v.; drainage, sewerage.    lavatory, laundry, washhouse^†; washerwoman, laundress, dhobi^†, laundryman, washerman^†; scavenger, dustman^†, sweep; white wings brush [U.S.]; broom, besom^†, mop, rake, shovel, sieve, riddle, screen, filter; blotter.    napkin, cloth, maukin^†, malkin^†, handkerchief, towel, sudary^†; doyley^†, doily, duster, sponge, mop, swab.    cover, drugget^†.    wash, lotion, detergent, cathartic, purgative; purifier etc. v.; disinfectant; aperient^†; benzene, benzine benzol, benolin^†; bleaching powder, chloride of lime, dentifrice, deobstruent^†, laxative.    ... meer laten zien

Roget 60: arrangement; plan etc. 626; preparation etc. 673; disposal, disposition; collocation, allocation; distribution; sorting etc. v.; assortment, allotment, apportionment, taxis, taxonomy, syntaxis^†, graduation, organization; grouping; tabulation.    analysis, classification, clustering, division, digestion.    [Result of arrangement] digest; synopsis etc. (compendium) 596; syntagma [Gramm.], table, atlas; file, database; register.    etc. (record) 551; organism, architecture.    [Instrument for sorting] sieve, riddle, screen, sorter.    ... meer laten zien

Roget 260: hole, foramen; puncture, perforation; fontanel^†; transforation^†; pinhole, keyhole, loophole, porthole, peephole, mousehole, pigeonhole; eye of a needle; eyelet; slot.    opening; aperture, apertness^†; hiation^†, yawning, oscitancy^†, dehiscence, patefaction^†, pandiculation^†; chasm etc. (interval) 198.    embrasure, window, casement; abatjour^†; light; sky light, fan light; lattice; bay window, bow window; oriel [Arch.]; dormer, lantern.    outlet, inlet; vent, vomitory; embouchure; orifice, mouth, sucker, muzzle, throat, gullet, weasand^†, wizen, nozzle; placket.    portal, porch, gate, ostiary^†, postern, wicket, trapdoor, hatch, door; arcade; cellarway^†, driveway, gateway, doorway, hatchway, gangway; lich gate^†.    way, path etc. 627; thoroughfare; channel; passage, passageway; tube, pipe; water pipe etc. 350; air pipe etc. 351; vessel, tubule, canal, gut, fistula; adjutage^†, ajutage^†; ostium^†; smokestack; chimney, flue, tap, funnel, gully, tunnel, main; mine, pit, adit^†, shaft; gallery.    alley, aisle, glade, vista.    bore, caliber; pore; blind orifice; fulgurite^†, thundertube^†.    porousness, porosity.    sieve, cullender^†, colander; cribble^†, riddle, screen; honeycomb.    apertion^†, perforation; piercing etc. v.; terebration^†, empalement^†, pertusion^†, puncture, acupuncture, penetration.    key etc. 631, opener, master key, password, combination, passe-partout.    ... meer laten zien

Roget 519: unintelligibility; incomprehensibility, imperspicuity^†; inconceivableness, vagueness etc. adj.; obscurity; ambiguity etc. 520; doubtful meaning; uncertainty etc. 475; perplexity etc. (confusion) 59; spinosity^†; obscurum per obscurius [Lat.]; mystification etc. (concealment) 528; latency etc. 526; transcendentalism.    paradox, oxymoron; riddle, enigma, puzzle etc. (secret) 533; diagnus vindice nodus [Lat.]; sealed book; steganography^†, freemasonry.    pons asinorum [Lat.], asses' bridge; high Dutch, Greek, Hebrew; jargon etc. (unmeaning) 517.    ... meer laten zien

Roget 533: secret; dead secret, profound secret; arcanum^†, mystery; latency etc. 526; Asian mystery^†; sealed book, secrets of the prison house; le desous des cartes [Fr.].    enigma, riddle, puzzle, nut to crack, conundrum, charade, rebus, logogriph^†; monogram, anagram; Sphinx; crux criticorum [Lat.].    maze, labyrinth, Hyrcynian wood; intricacy, meander.    problem etc. (question) 461; paradox etc. (difficulty) 704; unintelligibility etc. 519; terra incognita etc. (ignorance) 491.    ... meer laten zien

Nederlands: woordraadsel, hersenbreker, raadselachtige zaak, enigma, raadsel
Pools: enigmat

A coarse sieve (as for gravel).

Pools: rzeszoto

Pierce with many holes.

Roget 60: reduce to order, bring into order; introduce order into; rally.    arrange, dispose, place, form; put in order, set in order, place in order; set out, collocate, pack, marshal, range, size, rank, group, parcel out, allot, distribute, deal; cast the parts, assign the parts; dispose of, assign places to; assort, sort; sift, riddle; put to rights, set to rights, put into shape, put in trim, put in array; apportion.    class, classify; divide; file, string together, thread; register etc. (record) 551; catalogue, tabulate, index, graduate, digest, grade.    methodize, regulate, systematize, coordinate, organize, settle, fix.    unravel, disentangle, ravel, card; disembroil^†; feaze^†.    ... meer laten zien

Roget 260: open, ope^†, gape, yawn, bilge; fly open.    perforate, pierce, empierce^†, tap, bore, drill; mine etc. (scoop out) 252; tunnel; transpierce^†, transfix; enfilade, impale, spike, spear, gore, spit, stab, pink, puncture, lance, stick, prick, riddle, punch; stave in.    cut a passage through; make way for, make room for.    uncover, unclose, unrip^†; lay open, cut open, rip open, throw open, pop open, blow open, pry open, tear open, pull open.    ... meer laten zien

Nederlands: doorzeven

Set a difficult problem or riddle.

Separate with a riddle, as grain from chaff.

synoniem: screen.

Spread or diffuse through:
— His campaign was riddled with accusations and personal attacks.

synoniemen: diffuse, imbue, interpenetrate, penetrate, permeate, pervade.

Nederlands: diffuus, doordringen

Speak in riddles.

Explain a riddle.