What's the difference between blacken and slacken?

Blacken


Definition:

  • (v. t.) To make or render black.
  • (v. t.) To make dark; to darken; to cloud.
  • (v. t.) To defame; to sully, as reputation; to make infamous; as, vice blackens the character.
  • (v. i.) To grow black or dark.

Example Sentences:

  • (1) At the end of each session, he is forced to don a pair of blackened goggles, ear muffs are placed over his head, and he is ordered to place the palms of his hands together so that a guard can grasp his thumbs to lead him away.
  • (2) The purpose of the present study was to analyze the influence of various storing principles, film speed, and distance from X-ray source upon the degree of film blackening.
  • (3) Grilled Grill herring with a little oil and salt and the skin will blacken and crisp to reveal a creamy delicious flesh inside.
  • (4) The only reminder of what happened is a small, blackened, crater near the northern part of town, where a rocket laced with a nerve agent fell, killing more than 70 people in one of the worst mass casualty chemical attacks in the six-year war in Syria .
  • (5) People brought flowers, and large piles of roses, lilac, tulips and carnations lay by the blackened doors.
  • (6) Quantitative evaluation of the autoradiographs is achieved by careful calibration of the X-ray film blackening.
  • (7) Addition of xylose (4.0 g) and L-lysine hydrochloride (5.4 g) to the above formulation improved differentiation between Salmonella and the few Citrobacter strains that grew and produced more intense blackening in Salmonella colonies.
  • (8) The Spanish classic arroz negro pays homage to both old country and new: instead of the standard squid ink and fish stock, it’s made with crab bisque and chilmole (the blackened chilli sauce of the Yucatán) and crowned with calamari stuffed with pork scratchings.
  • (9) In animals given the drug alone, there was dermatitis and blackening of the skin and hair, serum glutamic oxalacetic transaminase and serum glutamic pyruvic transaminase enzymes were significantly increased, and liver biopsy revealed diffuse cytoplasmic swelling and granulation of the hepatocytes.
  • (10) Nine screen-film combinations were exposed at 70 to 80 kv., using a 12-pulse generator and Bucky grid till blackening of S = 1 was obtained.
  • (11) The ability to recognise detail related to detail size, film blackening and exposure geometry was studied for various systems, and the quality profiles are discussed.
  • (12) He was knocked to the ground with a rifle butt, which blackened his left eye.
  • (13) 12 patients showed isolated mucosal inflammation, 5 blackish deposits (of impacted soot) and blisters in 6 (with shreds of mucosa hanging loose); the endoscopy was normal in 18; 66% of those with blisters (4 cases out of 6) and 40% with blackened mucosa (2 cases out of 5) were observed in burns from fires.
  • (14) Other anaerobes, Enterobacteriaceae, and enterococci either failed to grow on BBE agar or did not produce the characteristic morphology and blackening associated with isolates of the B. fragilis group.
  • (15) But those crows also gather on the blackened rafters of British-era bungalows, while tanks and artillery pieces on which the wealth of a poor nation was squandered for decades sit rusting on hilltops.
  • (16) Whole-body autoradiography, combined with densitometric measurement of the blackening of the autoradiograms, and liquid scintillation counting were used to determine the levels of radioactivity in the inner ear in relation to blood and other tissues.
  • (17) Another selection strategy performed by the instrument involves growing the cells on a thin, blackened polyester film which can be cut by the argon laser beam.
  • (18) We describe a typical case with photographs demonstrating multiple blackened hyperkeratotic lesions of the palmar aspects of the fingers and palm, some linear, some circular.
  • (19) And yet, comparing British casualty rates with those of France, Germany and Italy, Haig's reputation looks to have been disproportionately blackened.
  • (20) Such inexpensive devices are cost effective alternatives to blackened surgical instruments.

Slacken


Definition:

  • (a.) To become slack; to be made less tense, firm, or rigid; to decrease in tension; as, a wet cord slackens in dry weather.
  • (a.) To be remiss or backward; to be negligent.
  • (a.) To lose cohesion or solidity by a chemical combination with water; to slake; as, lime slacks.
  • (a.) To abate; to become less violent.
  • (a.) To lose rapidity; to become more slow; as, a current of water slackens.
  • (a.) To languish; to fail; to flag.
  • (a.) To end; to cease; to desist; to slake.
  • (v. t.) To render slack; to make less tense or firm; as, to slack a rope; to slacken a bandage.
  • (v. t.) To neglect; to be remiss in.
  • (v. t.) To deprive of cohesion by combining chemically with water; to slake; as, to slack lime.
  • (v. t.) To cause to become less eager; to repress; to make slow or less rapid; to retard; as, to slacken pursuit; to slacken industry.
  • (v. t.) To cause to become less intense; to mitigate; to abate; to ease.
  • (n.) A spongy, semivitrifled substance which miners or smelters mix with the ores of metals to prevent their fusion.

Example Sentences:

  • (1) Torque pulses (of 10 or 100 msec) injected randomly to load or unload the movements stretched or slackened the appropiate prime movers: biceps or triceps.
  • (2) Although the rate of growth has slackened somewhat during recent years, the private pension movement is now a major contributor to the income maintenance needs of the American worker during retirement.
  • (3) While the slackening of the woof and the dimension of the meshes are minimal at both the beginning and end of the cycle, they reach a maximum on forteenth day.
  • (4) Increasing doses led to a negative inotropic effect with slackened relaxation and loss of its load sensitivity (up to 390 mumol l-1 for sulmazole; up to 350 mumol-1 for theophylline).
  • (5) Our findings suggest a mechanism eventually leading to slackening of the cervical spine ligamentous apparatus and atlantoaxial subluxation in RA.
  • (6) The result is diminished uterine volume and slackening of the myometrium.
  • (7) This also raises the question to what extent these fears become manifest because of a slackening of the defence mechanisms.
  • (8) The collagen fibres in this case stretch out and the skin tension slackens.
  • (9) The potential for slackened physician-patient relationships, however, could jeopardize that quality.
  • (10) One is the mobilization of a global effort to develop and test technologies, where the available technologies are not satisfactory to meet the needs and where the research is slackening.
  • (11) Blepharochalasis implies the symptom or general term (Kettesy) applied to the slackening and thinning out of the upper lid.
  • (12) After strong growth in the first six months of the year, the pace of growth in manufacturing has also slackened as a result of weaker demand from key markets including Europe and China.” Taken as a whole the UK’s economy is now 3.4% above its pre-crisis peak in the first quarter of 2008.
  • (13) 10 (11 p.cent) died within one month of surgery, but slackening of the sutures was an attributable cause in none of these cases.
  • (14) So over the coming months, far from slackening, you'll see the rate of change and reform at the BBC go faster and deeper.
  • (15) The Tumble is hard but it slackens off after a couple of kilometres so it’s hard to pull out a lot of time.
  • (16) Vmax was also determined by a procedure in which the cell length was slackened and the time of unloaded shortening was recorded (slack test).
  • (17) The sales pattern of the aerosols altered, showing a slackening of the rate of increase of sales in 1966 and 1967.
  • (18) Its growth rate and cellular structure were observed over the subsequent 19 months, the former remaining constant for the first 14 months, then slackening markedly during the final 4 months.
  • (19) On debt and taxation, rich and poor countries are worlds apart | Tove Maria Ryding Read more “Already, several countries have turned to multilateral lending institutions, such as the IMF and the World Bank, in order to obtain financial assistance: Angola, Azerbaijan, Ghana, Kenya, Mozambique, Nigeria, Zambia and Zimbabwe have already asked for bailouts or are in talks to do so.” The trade and development report said that against a backdrop of falling commodity prices and slackening growth in the developed world, borrowing costs for poor countries had been “driven up very quickly, turning what seemed reasonable debt burdens under favourable conditions into largely unsustainable debt.
  • (20) In another welcome sign of rebalancing, exports to non-EU countries were up by 3.5% ( full details here ) Photograph: ISTAT 9.25am BST Draghi is also warning that eurozone governments must not slacken off the pace of reform - a familiar refrain for the ECB chief: Thanks to their consolidation efforts so far, the primary fiscal deficit for the euro area has fallen from 3.5% of GDP in 2009 to around 0.5% in 2012.