英：word-forming element denoting action, quality, or state, attached to an adjective or past participle to form an abstract noun, from O.E. -nes(s), from West Germanic *in-assu- (cf. O.S. -nissi, M.Du. -nisse, Du. -nis, O.H.G. -nissa, Ger. -nis, Goth. -inassus), from *-in-, noun stem, + *-assu-, abstract noun suffix, probably from the same root as L. -tudo (see -tude).
n.making no effort 毫不费力，前缀ef=ex=out，fort=strong
She plays with seemingly effortless skill.
n.lacking grace;lacking a sense of what is right and proper 不优美；粗野；不知廉耻
We looked for signs of gracelessness to prove she was the princess she claimed to be.
In a display of utter shamelessness,he pulled out several $100 bills and began waving them in their faces.