[{"word":"stiffen","phonetic":"/ˈstɪfən/","phonetics":[{"text":"/ˈstɪfən/","audio":""}],"meanings":[{"partOfSpeech":"verb","definitions":[{"definition":"To make stiff.","synonyms":[],"antonyms":[]},{"definition":"To become stiff.","synonyms":[],"antonyms":[]}],"synonyms":["starken"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/stiffen"]}]