ill temper, n. irascibility, waspishness, peevishness, spleen, bile, choler; crossness, crabbedness, crabbiness, crankiness, grouchiness, grumpiness; moodiness, sulkiness, gloominess, sullenness, moroseness; bitterness, acerbity, asperity, sourness, churlishness, surliness; irritability, curtness, tartness, sharpness; ill humor, touchiness, testiness, thin-skinnedness, fretfulness, petulance.
ill-tempered, adj. ill-humored, cross, irascible, choleric, splenetic; crabby, crabbed, cranky, grouchy, grumpy, cantankerous, crotchety, crusty; irritable, touchy, testy, thin-skinned, waspish, peevish, petulant; moody, sulky, sullen, dour, gloomy, sullen, morose; bitter, acrimonious, acerbic, sour, caustic, tart, churlish, surly; huffish, huffy, in a pique, piqued, Archaic. in a pucker, Inf. in a stew, in a fume; angry, irate, in high dudgeon, wrathful, raging, fuming, furious, worked up.
2. unkindly, unamiable, unfriendly. See - ill-humored (def. 2).
ill-timed, adj. inopportune, untimely, mistimed, inconvenient, inexpedient; inauspicious, unpropitious, unfavorable, unfortunate, unhappy, unlucky; ill-omened, ill-fated, ill-starred, doomed.
ill-treat, v. abuse, maltreat, harm. See - mistreat.
illuminate, v. 1. light up, light, lighten, brighten; illumine, Archaic, illume, Obs. enlumine; irradiate, radiate, cast light upon, shine, beam, stream; make flare or flame, burn, glow, incandesce, phosphoresce; shimmer, sparkle, scintillate, glitter, gleam; flash, flicker, fulgurate, coruscate; make resplendent or illustrious.
2. clarify, elucidate, explain, make plain, explicate, make lucid or clear; define, expound, make explicit; interpret, decipher, literalize, render intelligible; clear up, solve, resolve, simplify, shed or cast light on, throw light upon; expose, bare, lay open, bring to light, Archaic, enucleate; unfold, unmask, unveil, uncover; show, demonstrate, illustrate, hold the mirror up to; manifest, point out, set forth, exhibit; describe, delineate, margin, gloss, annotate.
3. enlighten, inform, make aware, disabuse, give insight to; open the eyes of, shed or cast light on, bring out of the wilderness, civilize; instruct, teach, indoctrinate, educate, guide; tell, acquaint, familiarize with, make known to; apprise, notify, reveal, divulge, impart; communicate, initiate, introduce, edify, inculcate; school, tutor, train, nurture, prepare, prime, counsel, advise; discipline, drill, exercise, coach, lecture, catechize; persuade, convince, prevail upon, induce; stimulate, inspire, animate, exalt, ennoble, elevate; instill, impart, fill with genius, light the torch.
4. emblazon, blazon, Archaic, emblaze; color, imbue with color, brighten, rubricate; (all of manuscripts) illustrate, miniate, elaborate; daub, paint, crayon, pigment, stain, dye; tinge, tint, gild; enamel, lacquer.
5. decorate, adorn, ornament, embellish, enrich, enhance, beautify; grace, embroider, trim, dress, trick out; bedizen, deck, bedeck, Archaic, bedight, array, festoon, garnish; spruce up, make smart, Inf. titivate.
illumination, n. 1. lighting up, lighting, luminescence; luminosity, radiation, shining, beaming, gleaming; irradiation, glowing, fluorescence, incandescence, phosphorescence.
2. lightness, luminousness, radiance, shine, effulgence; reflection, glimmer, glitter, twinkle, sparkle, shimmer.
3. enlightenment, edification, awareness, insight, understanding; education, learning, wisdom, sapience; apprisal, information, knowledge.
4. light, beam, ray, shaft of light, illuminant, source of light; lamp, lamplight, chandelier, electrolier, gas light, bulb, candle, taper, candelabrum; sunshine, star, shining star, blaze, fire.