(adv.) In a smooth manner.

ardently artfully astutely cagily calmly cannily cleverly cunningly easily effectively effortlessly eloquently evenly expressively facilely fervently flatly fluently forcefully foxily freely glibly glowingly graphically guilefully hands down impressively in glowing terms insidiously knowingly lightly like clockwork like nothing meaningfully no sweat on easy terms on the sly on wheels passionately peacefully placidly powerfully quiescently quietly readily regularly shiftily shrewdly simply slick slyly smooth spiritedly still stilly strikingly subtilely subtlely swimmingly tellingly tranquilly trickily uniformly unperturbedly vehemently vigorously vividly warily warmly well wilily without difficulty