Synonyms: unforced, unstrained
Definition: not resulting from undue effort; not forced
Usage: a voice with a pleasingly unforced quality; his playing is facile and unstrained
Similar words: effortless
Definition: requiring or apparently requiring no effort
Usage: the swallows glided in an effortless way through the busy air
Synonyms: willing, uncoerced, unforced
Definition: not brought about by coercion or force
Usage: the confession was uncoerced
Similar words: voluntary
Definition: of your own free will or design; done by choice; not forced or compelled
Usage: man is a voluntary agent; participation was voluntary; voluntary manslaughter; voluntary generosity in times of disaster; voluntary social workers; a voluntary confession