lightness

n [U]: great lightness of touch, eg when playing the piano 极轻的一触（如弹奏钢琴）.

light meter, light pen, light up, light-coloured, light-fingered, light-headed, light-hearted, light-heartedly, light-heartedness, light-heavyweight, light-sensitive, light-year, lighten, lighter, lighterage, lighterman, lighthearted, lighthouse, lighting, lightly, lightning, lightning conductor, lightning strike, lightning-bug, lightship, lightweight, ligneous, lignite, likability, like, like a ton of bricks, like any thing, like-minded, likeable (also likable), likelihood, likely, liken, likeness, likes, likewise,