[{"Bold_text": "adjective", "List Items": ["not changing or varying; uniform ; regular ; invariable :All conditions during the three experiments were constant.Synonyms: permanent , immutable Antonyms: changeable", "continuing without pause or letup; unceasing :constant noise.Synonyms: unremitting , perpetual Antonyms: fitful", "regularly recurrent; continual ; persistent :He found it impossible to work with constant interruption.Synonyms: ceaseless , incessant Antonyms: sporadic", "faithful; unswerving in love, devotion, etc.:a constant lover.Synonyms: true , staunch , loyal Antonyms: unreliable", "steadfast; firm in mind or purpose; resolute .Synonyms: steady", "Obsolete.certain; confident."]}, {"Bold_text": "noun", "List Items": ["something that does not or cannot change or vary.", "Physics.a number expressing a property, quantity, or relation that remains unchanged under specified conditions.", "Mathematics.a quantity assumed to be unchanged throughout a given discussion."]}, {"Bold_text": "noun", "List Items": ["Paul Hen·ri Ben·ja·min Bal·luat[pawl ah, n, -, ree, ba, n, -zh, a, -, man, b, a, -, lwa]. Paul d'Estournelles de Constant Paul d'Estournelles de Constant.", "Jean Jo·seph Ben·ja·min[zhah, n, zhaw-, zef, ba, n, -zh, a, -, man],1845–1902,French painter."]}]