[{"word":"imperceptible","phonetics":[],"meanings":[{"partOfSpeech":"adjective","definitions":[{"definition":"Not perceptible, not detectable, too small in magnitude to be observed","synonyms":["imperceivable","undistinguishable","unperceivable"],"antonyms":["detectable","perceptible"],"example":"We all missed the imperceptible shake of his head as he tried to warn us without being seen."}],"synonyms":["imperceivable","undistinguishable","unperceivable"],"antonyms":["detectable","perceptible"]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/imperceptible"]}]