Falseheartedly refers to a lack of sincerity or honesty. Antonyms for falseheartedly include honestly, sincerely, authentically, genuinely, and candidly. These words indicate a level of openness and honesty in communication and actions, without any hidden agendas or ulterior motives. Other antonyms for falseheartedly include faithfully, devotedly, and loyally. These words connote a sense of commitment and trustworthiness, reinforcing the notion that the speaker or actor is genuine in their intentions. Using antonyms for falseheartedly can help to convey a more positive tone in communication and actions, fostering relationships built on honesty, trust, and mutual respect.