n.刻字；印字
动词letter的现在分词.
The lettering on the gravestone was badly worn and almost illegible. 墓碑上的文字已严重磨损难以辨认。
The sign was no longer legible because much of the lettering had worn away. 这块招牌已看不清楚，因为大部分字已磨掉了。
