Synonyms for freely
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Without physical restriction
loosely, easily, smoothly, without encumbrance, unobstructedly, without restraint, as one pleases, without let or hindrance.
Antonyms with difficulty, under obstacles, under restraint.
Without mental restriction
voluntarily, willingly, of one's own accord, at will, at pleasure, at discretion, of one's own free will, of one's own volition, purposely, deliberately, intentionally, advisedly, designedly, without urging, generously, liberally, without stint, with abandon, spontaneously, frankly, openly, unreservedly, candidly, without constraint.
Antonyms unwillingly*, under compulsion, hesitantly.
See freely in Webster's New World Roget's A-Z Thesaurus II
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