What's the difference between hard and rigid?

Hard


Definition:

  • (superl.) Not easily penetrated, cut, or separated into parts; not yielding to pressure; firm; solid; compact; -- applied to material bodies, and opposed to soft; as, hard wood; hard flesh; a hard apple.
  • (superl.) Difficult, mentally or judicially; not easily apprehended, decided, or resolved; as a hard problem.
  • (superl.) Difficult to accomplish; full of obstacles; laborious; fatiguing; arduous; as, a hard task; a disease hard to cure.
  • (superl.) Difficult to resist or control; powerful.
  • (superl.) Difficult to bear or endure; not easy to put up with or consent to; hence, severe; rigorous; oppressive; distressing; unjust; grasping; as, a hard lot; hard times; hard fare; a hard winter; hard conditions or terms.
  • (superl.) Difficult to please or influence; stern; unyielding; obdurate; unsympathetic; unfeeling; cruel; as, a hard master; a hard heart; hard words; a hard character.
  • (superl.) Not easy or agreeable to the taste; stiff; rigid; ungraceful; repelling; as, a hard style.
  • (superl.) Rough; acid; sour, as liquors; as, hard cider.
  • (superl.) Abrupt or explosive in utterance; not aspirated, sibilated, or pronounced with a gradual change of the organs from one position to another; -- said of certain consonants, as c in came, and g in go, as distinguished from the same letters in center, general, etc.
  • (superl.) Wanting softness or smoothness of utterance; harsh; as, a hard tone.
  • (superl.) Rigid in the drawing or distribution of the figures; formal; lacking grace of composition.
  • (superl.) Having disagreeable and abrupt contrasts in the coloring or light and shade.
  • (adv.) With pressure; with urgency; hence, diligently; earnestly.
  • (adv.) With difficulty; as, the vehicle moves hard.
  • (adv.) Uneasily; vexatiously; slowly.
  • (adv.) So as to raise difficulties.
  • (adv.) With tension or strain of the powers; violently; with force; tempestuously; vehemently; vigorously; energetically; as, to press, to blow, to rain hard; hence, rapidly; as, to run hard.
  • (adv.) Close or near.
  • (v. t.) To harden; to make hard.
  • (n.) A ford or passage across a river or swamp.

Example Sentences:

  • (1) Lucy and Ed will combine coverage of hard and breaking news with a commitment to investigative journalism, which their track record so clearly demonstrates”.
  • (2) Sierra Leone is one of the three West Africa nations hit hard by an Ebola epidemic this year.
  • (3) Topical and systemic antibiotic therapy is common in dermatology, yet it is hard to find a rationale for a particular route in some diseases.
  • (4) Given Australia’s number one position as the worst carbon emitter per capita among major western nations it seems hardly surprising that islanders from Fiji, Samoa, Vanuatu and other small island developing states have been turning to Australia with growing exasperation demanding the country demonstrate an appropriate response and responsibility.
  • (5) They had learned through hard experience what Frederick Douglass once taught -- that freedom is not given, it must be won, through struggle and discipline, persistence and faith.
  • (6) In 60 rhesus monkeys with experimental renovascular malignant arterial hypertension (25 one-kidney and 35 two-kidney model animals), we studied the so-called 'hard exudates' or white retinal deposits in detail (by ophthalmoscopy, and stereoscopic color fundus photography and fluorescein fundus angiography, on long-term follow-up).
  • (7) It is a moment to be grateful for what remains of Labour's hard left: an amendment to scrap the cap was at least tabled by John McDonnell and Jeremy Corbyn but stood no chance.
  • (8) She stopped working only when the pain made it hard for her to get to work.
  • (9) He was reclusive, I know that, and he was often given a hard time for it.
  • (10) This defeat, though, is hardly a good calling card for the main job.
  • (11) Since this test is easily performed and hardly stresses the patient, it should routinely be the initial one for the diagnosis of renal osteopathy.
  • (12) Never become so enamored of your own smarts that you stop signing up for life’s hard classes.
  • (13) But I don't wish to be too hard on the judge for not taking that view.
  • (14) Our campaign has been going for some time and each step in our progress has been hard won, by campaigners paid and volunteer alike.
  • (15) I am rooting hard for you.” Ronald Reagan simply told his former vice-president Bush: “Don’t let the turkeys get you down.” By 10.30am Michelle Obama and Melania Trump will join the outgoing and incoming presidents in a presidential limousine to drive to the Capitol.
  • (16) All the same, it's hard to approach the school, which charges nearly £28,000 for boarders and nearly £19,000 for day girls and is sometimes called "the girls' Eton", without a few prejudices.
  • (17) Governmental officials as well as medical scientists in Taiwan have worked hard in recent years to develop and to implement various measures, such as prenatal diagnosis and neonatal screening, to lower the incidence of hereditary diseases and mental retardation in the population.
  • (18) Cooper, who was briefly a social worker in Los Angeles, also suggests working hard to build a rapport with colleagues in hotdesking situations.
  • (19) Critics of wind power peddle the same old myths about investment in new energy sources adding to families' fuel bills , preferring to pick a fight with people concerned about the environment, than stand up to vested interests in the energy industry, for the hard-pressed families and pensioners being ripped off by the energy giants.
  • (20) The spirit is great here, the players work very hard, we kept the belief when we were in third place and now we are here.

Rigid


Definition:

  • (a.) Firm; stiff; unyielding; not pliant; not flexible.
  • (a.) Hence, not lax or indulgent; severe; inflexible; strict; as, a rigid father or master; rigid discipline; rigid criticism; a rigid sentence.

Example Sentences:

  • (1) By the 1860s, French designs were using larger front wheels and steel frames, which although lighter were more rigid, leading to its nickname of “boneshaker”.
  • (2) Diphenoxylate-induced hypoxia was the major problem and was associated with slow or fast respirations, hypotonia or rigidity, cardiac arrest, and in 3 cases cerebral edema and death.
  • (3) Pitlike surface structures seen in negatively stained whole cells and thin sections were correlated with periodically spaced perforations of the rigid sacculus.
  • (4) Rigidly fixing the pubic symphysis stiffened the model and resulted in principal stress patterns that did not reflect trabecular density or orientations as well as those of the deformable pubic symphysis model.
  • (5) The fracture can be treated arthroscopically by rigid internal fixation, while at the same time treating possible associated lesions.
  • (6) This study examined the extent to which normal learners identified as cognitively rigid could use alternate strategies when instructed to do so.
  • (7) In some patients stimulation can reduce rigidity and coactivation of muscles immediately or slowly over days or months.
  • (8) Major alleviation of the rigidity and bradykinesia with chronic oral l-dopa therapy was not accompanied by any change in the silent period.
  • (9) At clinically achievable concentrations, the combination of nafcillin plus gentamicin produced enhanced killing against 13 of 14 strains of enterococci and was synergistic (by very rigid criteria) against 10 of 14 strains.
  • (10) Low-temperature NMR studies indicate that 5 is more rigid than tamoxifen; interconversion between enantiomeric conformers is slow on the NMR time scale at -75 degrees C.
  • (11) Global 'abnormality', hunching (rigid arching of back), hindlimb abduction, forepaw myoclonus, stereotyped lateral head movements, backing, and immobility occurred significantly only in drug-treated rats.
  • (12) A study was made of twelve cases with uveitis, glaucoma and hyphema (UGH) caused by rigid intraocular posterior chamber implants.
  • (13) Eight alpha-helices behave as relatively rigid bodies and corner regions are more flexible, showing larger fluctuations.
  • (14) This modification allows for precision of movement, ease of repositioning, and adaptation of rigid skeletal stabilization of mobilized osseous segments in the chin.
  • (15) The pedicle screw systems were always the most rigid.
  • (16) Lactate dehydrogenase (LDH) levels and subunit isozyme patterns in cornea were monitored in 36 albino rabbits wearing thick, rigid, gas-permeable contact lenses for periods of 24 h, 2 and 7 days, and 1 and 3 months.
  • (17) The prevalence of sleep apnea, apnea index, duration of the longest episode of apnea, and penile rigidity were tabulated.
  • (18) During the last 21 months, 12 additional children have been managed with a more stringent protocol combining neck immobilization in a rigid cervical brace for 3 months and restriction of both contact and noncontact sports, together with a major emphasis on patient compliance.
  • (19) In the second placebo controlled experiment 150 mg im testosterone enanthate administration was associated with enhanced rigidity of NPT but with no effect on frequency or circumference change of NPT and no effect on frequency of REM.
  • (20) The whole isolator system included two rigid supply isolators, too.