[{"word":"hardness","phonetics":[{"audio":"https://api.dictionaryapi.dev/media/pronunciations/en/hardness-us.mp3","sourceUrl":"https://commons.wikimedia.org/w/index.php?curid=2651014","license":{"name":"BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"}}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The quality of being hard.","synonyms":[],"antonyms":[]},{"definition":"An instance of this quality; hardship.","synonyms":[],"antonyms":[]},{"definition":"The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).","synonyms":[],"antonyms":[]},{"definition":"The resistance to scratching, cutting, indentation or abrasion of a metal or other solid material.","synonyms":[],"antonyms":[]},{"definition":"The penetrating ability of electromagnetic radiation, such as x-rays; generally, the shorter the wavelength, the harder and more penetrating the radiation.","synonyms":[],"antonyms":[]},{"definition":"The measure of resistance to damage of a facility, equipment, installation, or telecommunications infrastructure when subjected to attack.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/hardness"]}]