What's the difference between harmful and harmless?

Harmful


Definition:

  • (a.) Full of harm; injurious; hurtful; mischievous.

Example Sentences:

  • (1) Chapman and the other "illegals" – sleeper agents without diplomatic cover – seem to have done little to harm American national security.
  • (2) Bacterial lipopolysaccharides (LPS), which are important components of the cell wall of gram-negative bacteria, induce a number of host responses both beneficial and harmful.
  • (3) Robert Francis QC's official report in February on the Mid Staffordshire care scandal, in which an estimated 400 to 1,200 patients died unnecessarily at Stafford hospital between 2005 and 2008, called for the NHS to make "zero harm" its objective.
  • (4) I realise now that the drug is far less harmful then I believed at the time.
  • (5) Irrespective of method, the suicide attempt was predominantly a psychotic act of young single people with chronic, severe disorders and considerable past parasuicide, in a setting of escalating self-harm.
  • (6) Speaking to reporters at the Pentagon, People's Liberation Army's chief of the general staff Gen Fang Fenghui also warned that the US must be objective about tensions between China and Vietnam or risk harming relations between Washington and Beijing.
  • (7) Jails and prison populations are unique in the incidence of deliberate self-harm, but the phenomenon is not well understood.
  • (8) It’s been widely reported that black people are disproportionately harmed by the mortgage market.
  • (9) Repeat patients were more likely to threaten to harm others, have a diagnosis of adjustment disorder, conduct or oppositional disorder and be under the care of a child welfare agency.
  • (10) Considerations of different ways of obtaining informed consent, determining ways of minimizing harm, and justifications for violating the therapeutic obligation are discussed but found unsatisfactory in many respects.
  • (11) Judge John Burgess told the men that their intention was “to do great harm in a peaceful community”.
  • (12) Lack of transparency about the nature of the relationship between police and media also led to speculation and perceptions, whatever the facts, that caused "serious harm".
  • (13) The problem of the achondroplast arises when his surroundings, right from the start, reject his disorder, connoting it with destructive anxiety: this seriously harms the subject's physical image, making him an outcast.
  • (14) Religious efforts to address the issue have also been complicit in absolving men of their crimes, objectifying women and doing more harm than good with campaigns that blame women for the phenomenon.
  • (15) Both the observance of occupational limit-values for dusts and other harmful materials at the work place, which have effects on the respiration system, and the medical survey of workers with the use of special methods for examination of respiratory system are necessary.
  • (16) Changes in the fitness of harmful mutations may therefore impose a greater long-term disadvantage on asexual populations than those which are sexual.
  • (17) The possibility of being liable if an incompetent student becomes registered and causes harm is also discussed.
  • (18) Butler was convicted of grevious bodily harm and child cruelty, and sentenced to prison.
  • (19) Was the Dalkon Shield so harmful in the nulliparous woman?
  • (20) Education can increase compliance and sometimes modify harmful behavior.

Harmless


Definition:

  • (a.) Free from harm; unhurt; as, to give bond to save another harmless.
  • (a.) Free from power or disposition to harm; innocent; inoffensive.

Example Sentences:

  • (1) For the mouthrinses containing 0.05% NaF the retention was about 0.4 mg F. This value is considered to be harmless.
  • (2) A harmless slice of Americana from the best fans in the world.
  • (3) Most hemangiomas are small, harmless birthmarks that appear soon after birth, proliferate for 8 to 18 months, and then slowly regress over the next 5 to 8 years, leaving normal or slightly blemished skin.
  • (4) Pelvic phleboliths are common and are generally considered to be harmless.
  • (5) It also intrigues me that the reaction of some women when challenged on this question so uncannily echoes the defence of sexist men in the 60s and 70s: come off it, love, it's just a bit of harmless fun.
  • (6) The high frequency of coxa magna in these patients and its possible role in the development of degenerative arthritis indicate that transient synovitis of the hip should not be considered a harmless disease until further epidemiologic studies are available.
  • (7) The activity and harmlessness of the virus was tested on sheep.
  • (8) The adults of the trematode occurring in the nasal sinuses and posterior nasal passage of the dolphins are considered as practically harmless for the host but thier eggs, aspirated deep into the bronchial tree, may initiate a foreign-body of inflammatory reaction in the lungs and continuous aspiration of such eggs may provoke a chronic pneumonia condition.
  • (9) Of all patients examined during that period for palpable breast tumors, 90 (=16.5%) were spared a breast operation thanks to fine-needle aspirations confirming the presence of harmless cysts only.
  • (10) They show once more that the treatment is harmless for the fetus.
  • (11) They are usually harmless, though they can cause an allergic reaction in a minority of people.
  • (12) Hepatic vascular exclusion (from 24 to 30mn) was harmless to the remnant liver and the kidneys.
  • (13) As regards post-therapeutic monitoring, MRI with gadolinium contrast injection is harmless and will make it possible to follow these patients regularly and to detect recurrences.
  • (14) CT, being a non-traumatic, harmless diagnostic method, improves the clinical evaluation of the patient and can facilitate the choice of the most suitable therapeutic modalities, as well as the follow-up of their results.
  • (15) Symptoms of bleeding, almost always harmless skin or mucosal bleeding, were found in 45% of patients with a history of intravenous drug abuse and in 18% of the homo- or bisexual men.
  • (16) A paradigm shift has occurred in which toxicity has been recognized at levels long held to be harmless.
  • (17) These results suggest that elevated glycine levels may be harmless in blood, but lethal in brain.
  • (18) It is superior to many other methods since it is non-invasive, harmless, and does not rely on the metabolism of a contrast agent.
  • (19) With equal reliability (96 percent), lumbar phlebography without catheterism is, by its simplicity and harmlessness and the absence of minor and major venous complications, preferable to phlebography by catheterism.
  • (20) The nature of the fistulous connection makes the release of the balloon inflated with silicone completely harmless.